Evolution of magnetic properties and microstructure of Hf2Co11B alloys

McGuire, Michael A.; Rios, Orlando

doi:10.1063/1.4907575

Title: Evolution of magnetic properties and microstructure of Hf2Co11B alloys

Abstract

Amorphous Hf₂Co₁₁B alloys produced by melt-spinning have been crystallized by annealing at 500-800 °C, and the products have been investigated using magnetization measurements, x-ray diffraction, and scanning electron microscopy. The results reveal the evolution of the phase fractions, microstructure, and magnetic properties with both annealing temperature and time. Crystallization of the phase denoted HfCo₇, which is associated with the development of coercivity, occurs slowly at 500 °C. Annealing at intermediate temperatures produces mixed phase samples containing some of the HfCo₇ phase with the highest values of remanent magnetization and coercivity. The equilibrium structure at 800 °C contains HfCo3B₂, Hf₆Co₂₃ and Co, and displays soft ferromagnetism. Maximum values for the remanent magnetization, intrinsic coercivity, and magnetic energy product among the samples are approximately 5.2 kG, 2.0 kOe, and 3.1 MGOe, respectively, which indicates that the significantly higher values observed in crystalline, melt-spun Hf₂Co₁₁B ribbons are a consequence of the non-equilibrium solidification during the melt-spinning process. Application of high magnetic fields during annealing is observed to strongly affect the microstructural evolution, which may provide access to higher performance materials in Zr/Hf-Co hard ferromagnets. The crystal structure of HfCo₇ and the related Zr analogues is unknown, and without knowledge of atomic positions powdermore »« less

Authors:

McGuire, Michael A. ^[1]; Rios, Orlando ^[1]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Publication Date:: Thu Feb 05 00:00:00 EST 2015

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

OSTI Identifier:: 1185598

Alternate Identifier(s):: OSTI ID: 1228520

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: Journal of Applied Physics

Additional Journal Information:: Journal Volume: 117; Journal Issue: 5; Journal ID: ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE

Citation Formats


                    McGuire, Michael A., and Rios, Orlando. Evolution of magnetic properties and microstructure of Hf2Co11B alloys.  United States: N. p., 2015. 
Web.  doi:10.1063/1.4907575.

Copy to clipboard


                    McGuire, Michael A., & Rios, Orlando. Evolution of magnetic properties and microstructure of Hf2Co11B alloys.  United States.  https://doi.org/10.1063/1.4907575

Copy to clipboard


                    McGuire, Michael A., and Rios, Orlando. Thu .  
"Evolution of magnetic properties and microstructure of Hf2Co11B alloys".  United States.  https://doi.org/10.1063/1.4907575.  https://www.osti.gov/servlets/purl/1185598.

Copy to clipboard


                    
@article{osti_1185598,

  title        = {Evolution of magnetic properties and microstructure of Hf2Co11B alloys},

  author       = {McGuire, Michael A. and Rios, Orlando},

  abstractNote = {Amorphous Hf2Co11B alloys produced by melt-spinning have been crystallized by annealing at 500-800 °C, and the products have been investigated using magnetization measurements, x-ray diffraction, and scanning electron microscopy. The results reveal the evolution of the phase fractions, microstructure, and magnetic properties with both annealing temperature and time. Crystallization of the phase denoted HfCo7, which is associated with the development of coercivity, occurs slowly at 500 °C. Annealing at intermediate temperatures produces mixed phase samples containing some of the HfCo7 phase with the highest values of remanent magnetization and coercivity. The equilibrium structure at 800 °C contains HfCo3B2, Hf6Co23 and Co, and displays soft ferromagnetism. Maximum values for the remanent magnetization, intrinsic coercivity, and magnetic energy product among the samples are approximately 5.2 kG, 2.0 kOe, and 3.1 MGOe, respectively, which indicates that the significantly higher values observed in crystalline, melt-spun Hf2Co11B ribbons are a consequence of the non-equilibrium solidification during the melt-spinning process. Application of high magnetic fields during annealing is observed to strongly affect the microstructural evolution, which may provide access to higher performance materials in Zr/Hf-Co hard ferromagnets. The crystal structure of HfCo7 and the related Zr analogues is unknown, and without knowledge of atomic positions powder diffraction cannot distinguish among proposed unit cells and symmetries found in the literature.},

  doi          = {10.1063/1.4907575},

  journal      = {Journal of Applied Physics},

  number       = 5,

  volume       = 117,

  place        = {United States},

  year         = {Thu Feb 05 00:00:00 EST 2015},

  month        = {Thu Feb 05 00:00:00 EST 2015}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Accepted Manuscript (Publisher)

Accepted Manuscript (DOE)

Publisher's Version of Record

https://doi.org/10.1063/1.4907575

Other availability

Search WorldCat to find libraries that may hold this journal

Citation Metrics:

Cited by: 15 works

Citation information provided by
Web of Science

Save / Share:

Export Metadata

Save to My Library

Works referenced in this record:

Hyperfine interactions at Ta impurities in cobalt and cobalt-hafnium intermetallic compounds
journal, June 1993

Bedi, S. C.; Forker, M.
Physical Review B, Vol. 47, Issue 22
DOI: 10.1103/PhysRevB.47.14948

${\rm HfCo}_{7}$-Based Rare-Earth-Free Permanent-Magnet Alloys
journal, July 2013

Das, B.; Balamurugan, B.; Kumar, P.
IEEE Transactions on Magnetics, Vol. 49, Issue 7
DOI: 10.1109/TMAG.2013.2242856

Assembly of uniaxially aligned rare-earth-free nanomagnets
journal, September 2012

Balamurugan, B.; Das, B.; Shah, V. R.
Applied Physics Letters, Vol. 101, Issue 12
DOI: 10.1063/1.4753950

Magnetic susceptibility of RCo ₃ B ₂ (R=Y, Sm, Gd, and Dy)
journal, May 1994

Ido, H.; Nanjo, M.; Yamada, M.
Journal of Applied Physics, Vol. 75, Issue 10
DOI: 10.1063/1.356704

High Steady Magnetic Field Processing of Functional Magnetic Materials
journal, May 2013

Rivoirard, Sophie
JOM, Vol. 65, Issue 7
DOI: 10.1007/s11837-013-0619-y

Processing of non-ferromagnetic materials in strong static magnetic field
journal, August 2013

Sun, Z. H. I.; Guo, M.; Vleugels, J.
Current Opinion in Solid State and Materials Science, Vol. 17, Issue 4
DOI: 10.1016/j.cossms.2013.05.001

Effects of Mo additive on structure and magnetic properties of Co82Zr18 alloy
journal, April 2009

Zhang, Jin-Bao; Sun, Qing-Wu; Wang, Wen-Quan
Journal of Alloys and Compounds, Vol. 474, Issue 1-2
DOI: 10.1016/j.jallcom.2008.07.004

Hard magnetic phase in rapidly quenched Zr-Co-B alloys
journal, January 1990

Ishikawa, T.; Ohmori, K.
IEEE Transactions on Magnetics, Vol. 26, Issue 5
DOI: 10.1109/20.104381

$R_{2}$ ${Fe}_{14}$ B materials: Intrinsic properties and technological aspects
journal, October 1991

Herbst, J. F.
Reviews of Modern Physics, Vol. 63, Issue 4
DOI: 10.1103/RevModPhys.63.819

Strong static magnetic field processing of metallic materials: A review
journal, October 2012

Sun, Z. H. I.; Guo, M.; Vleugels, J.
Current Opinion in Solid State and Materials Science, Vol. 16, Issue 5
DOI: 10.1016/j.cossms.2012.08.001

Thermomagnetic Processing of Liquid-Crystalline Epoxy Resins and Their Mechanical Characterization Using Nanoindentation
journal, October 2014

Li, Yuzhan; Rios, Orlando; Kessler, Michael R.
ACS Applied Materials & Interfaces, Vol. 6, Issue 21
DOI: 10.1021/am505874t

Coercivity Enhancement in ${\rm Zr}_{2}{\rm Co}_{11}$-Based Nanocrystalline Materials Due to Mo Addition
journal, November 2012

Zhang, Wenyong; Valloppilly, Shah R.; Li, Xingzhong
IEEE Transactions on Magnetics, Vol. 48, Issue 11
DOI: 10.1109/TMAG.2012.2198453

Magnetic properties enhancement of melt spun CoZrB ribbons by elemental substitutions
journal, November 2013

Chang, H. W.; Tsai, C. F.; Hsieh, C. C.
Journal of Magnetism and Magnetic Materials, Vol. 346
DOI: 10.1016/j.jmmm.2013.07.012

A study on the magnetic properties of melt spun Co-Hf-Zr-B nanocomposite ribbons
journal, May 2014

Chang, H. W.; Lin, Y. H.; Shih, C. W.
Journal of Applied Physics, Vol. 115, Issue 17
DOI: 10.1063/1.4866085

Magnetic properties, phase evolution, and coercivity mechanism of CoxZr98−xB2 (x=74−86) nanocomposites
journal, May 2005

Chen, L. Y.; Chang, H. W.; Chiu, C. H.
Journal of Applied Physics, Vol. 97, Issue 10
DOI: 10.1063/1.1853275

Cobalt-rich magnetic phases in Zr–Co alloys
journal, October 2001

Gabay, A. M.; Zhang, Y.; Hadjipanayis, G. C.
Journal of Magnetism and Magnetic Materials, Vol. 236, Issue 1-2
DOI: 10.1016/S0304-8853(01)00446-2

Hf–Co and Zr–Co alloys for rare-earth-free permanent magnets
journal, January 2014

Balamurugan, B.; Das, B.; Zhang, W. Y.
Journal of Physics: Condensed Matter, Vol. 26, Issue 6
DOI: 10.1088/0953-8984/26/6/064204

Single crystal studies on Co-containing τ-borides Co23−xMxB6 (M=Al, Ga, Sn, Ti, V, Ir) and the boron-rich τ-boride Co12.3Ir8.9B10.5
journal, March 2009

Kotzott, Dominik; Ade, Martin; Hillebrecht, Harald
Journal of Solid State Chemistry, Vol. 182, Issue 3
DOI: 10.1016/j.jssc.2008.10.036

Hard magnetic property enhancement of Co ₇ Hf-based ribbons by boron doping
journal, November 2014

Chang, H. W.; Liao, M. C.; Shih, C. W.
Applied Physics Letters, Vol. 105, Issue 19
DOI: 10.1063/1.4901737

The exchange-spring magnet: a new material principle for permanent magnets
journal, July 1991

Kneller, E. F.; Hawig, R.
IEEE Transactions on Magnetics, Vol. 27, Issue 4, p. 3588-3560
DOI: 10.1109/20.102931

Ab initio theoretical study of magnetization and phase stability of the ${(Fe, Co, Ni)}_{23} B_{6}$ and ${(Fe, Co, Ni)}_{23} {Zr}_{6}$ structures of ${Cr}_{23} C_{6}$ and ${Mn}_{23} {Th}_{6}$ prototypes
journal, October 2008

Ohodnicki, P. R.; Cates, N. C.; Laughlin, D. E.
Physical Review B, Vol. 78, Issue 14
DOI: 10.1103/PhysRevB.78.144414

Hard magnetic properties in melt-spun Co80Zr18−xMoxB2 alloys
journal, April 2010

Zhang, Ming-yan; Zhang, Jin-bao; Wu, Chun-ji
Physica B: Condensed Matter, Vol. 405, Issue 7
DOI: 10.1016/j.physb.2009.12.077

Differences in magnetic properties between amorphous and crystalline alloys
journal, November 1982

Buschow, K. H. J.
Journal of Applied Physics, Vol. 53, Issue 11
DOI: 10.1063/1.330146

Hard ferromagnetism in melt-spun Hf ₂ Co ₁₁ B alloys
journal, November 2012

McGuire, Michael A.; Rios, Orlando; Ghimire, Nirmal J.
Applied Physics Letters, Vol. 101, Issue 20
DOI: 10.1063/1.4766283

Structures of Zr ₂ Co ₁₁ and HfCo ₇ intermetallic compounds
journal, December 1991

Demczyk, B. G.; Cheng, S. F.
Journal of Applied Crystallography, Vol. 24, Issue 6
DOI: 10.1107/S0021889891007331

The microstructure of a magnetically hard Zr2Co11 alloy
journal, March 2009

Ivanova, G. V.; Shchegoleva, N. N.
The Physics of Metals and Metallography, Vol. 107, Issue 3
DOI: 10.1134/S0031918X09030089

High performance Co–Zr–B melt-spun ribbons
journal, April 2003

Saito, Tetsuji
Applied Physics Letters, Vol. 82, Issue 14
DOI: 10.1063/1.1565694

Hf Doping Effect on Hard Magnetism of Nanocrystalline Zr$_{18\hbox{-}{\rm x}}$Hf$_{\rm x}$Co$_{82}$ Ribbons
journal, July 2013

Al-Omari, I. A.; Zhang, W. Y.; Yue, Lanping
IEEE Transactions on Magnetics, Vol. 49, Issue 7
DOI: 10.1109/TMAG.2013.2245498

Current status of neodmium-iron-boron magnets
journal, March 2000

Matsuura, Y.
IEEE Transactions on Appiled Superconductivity, Vol. 10, Issue 1
DOI: 10.1109/77.828372

Crystal structure of Zr2Co11 hard magnetic compound
journal, April 2007

Ivanova, G. V.; Shchegoleva, N. N.; Gabay, A. M.
Journal of Alloys and Compounds, Vol. 432, Issue 1-2
DOI: 10.1016/j.jallcom.2006.05.122

Novel Nanostructured Rare-Earth-Free Magnetic Materials with High Energy Products
journal, August 2013

Balasubramanian, Balamurugan; Das, Bhaskar; Skomski, Ralph
Advanced Materials, Vol. 25, Issue 42
DOI: 10.1002/adma.201302704

Rare earth-cobalt permanent magnets
journal, November 1991

Strnat, Karl J.; Strnat, Reinhold M. W.
Journal of Magnetism and Magnetic Materials, Vol. 100, Issue 1-3
DOI: 10.1016/0304-8853(91)90811-N

Works referencing / citing this record:

Microstructure versus magnetic properties correlations in melt-spun Hf-Zr-Co-Fe-B alloys: role of thermal treatment
journal, June 2018

Christopher, Nithya; Anand, Kritika; Srivastava, A. K.
Materials Research Express, Vol. 5, Issue 6
DOI: 10.1088/2053-1591/aac863

Similar Records in DOE PAGES and OSTI.GOV collections:

Evolution of magnetic properties and microstructure of Hf{sub 2}Co{sub 11}B alloys

Journal Article McGuire, Michael A., E-mail: McGuireMA@ornl.gov ; Rios, Orlando - Journal of Applied Physics

Amorphous Hf{sub 2}Co{sub 11}B alloys produced by melt-spinning have been crystallized by annealing at 500–800 °C, and the products have been investigated using magnetization measurements, x-ray diffraction, and scanning electron microscopy. The results reveal the evolution of the phase fractions, microstructure, and magnetic properties with both annealing temperature and time. Crystallization of the phase denoted HfCo{sub 7}, which is associated with the development of coercivity, occurs slowly at 500 °C. Annealing at intermediate temperatures produces mixed phase samples containing some of the HfCo{sub 7} phase with the highest values of remanent magnetization and coercivity. The equilibrium structure at 800 °C contains HfCo{sub 3}B{submore »« less
https://doi.org/10.1063/1.4907575
Microstructure and Hard Magnetic Properties of Sm_1-xZr_x(Fe,Co)_11.3-yTi_0.7By Ingots and Thick Melt-Spun Ribbons

Journal Article Gabay, Alexander M. ; Hadjipanayis, George C. - IEEE Transactions on Magnetics

Permanent magnets made from Sm(Fe,Co)₁₂-based compounds are being actively pursued through nanostructuring and powder metallurgy. This study was aimed at the development of hard magnetic properties in bulk as-cast alloys and in melt-spun alloys for very low wheel speeds. Slower solidification rates and alloying with Zr promote the tetragonal ThMn₁₂-type crystal structure, whereas higher solidification rates and alloying with B replace the ThMn₁₂ structure type with the TbCu₇ structure type. When introduced simultaneously, Zr and B dramatically reduce the alloy solidification rates required for both the refinement of the 1:12 crystallites and their replacement with the 1:7 phase. In bulkmore »« less
https://doi.org/10.1109/tmag.2021.3102513

Full Text Available
Hard magnetic property enhancement of Co{sub 7}Hf-based ribbons by boron doping

Journal Article Chang, H. W. ; Liao, M. C. ; Shih, C. W. ; ... - Applied Physics Letters

Hard magnetic property enhancement of melt spun Co{sub 88}Hf{sub 12} ribbons by boron doping is demonstrated. B-doping could not only remarkably enhance the magnetic properties from energy product ((BH){sub max}) of 2.6 MGOe and intrinsic coercivity ({sub i}H{sub c}) of 1.5 kOe for B-free Co{sub 88}Hf{sub 12} ribbons to (BH){sub max} = 7.7 MGOe and {sub i}H{sub c} = 3.1 kOe for Co{sub 85}Hf{sub 12}B{sub 3} ribbons but also improve the Curie temperature (T{sub C}) of 7:1 phase. The (BH){sub max} value achieved in Co{sub 85}Hf{sub 12}B{sub 3} ribbons is the highest in Co-Hf alloy ribbons ever reported, which is about 15% higher thanmore »« less
https://doi.org/10.1063/1.4901737
Isotropic nanocrystalline Sm(Fe,Co)_11.3Ti_0.7 magnets modified with B and Zr

Journal Article Gabay, Alexander M. ; Hadjipanayis, George C. - Journal of Magnetism and Magnetic Materials

Rare-earth-lean Sm(Fe,Co,Ti)₁₂ alloys with the ThMn₁₂ crystal structure and less than one Ti atom per formula unit have the potential of exceptionally powerful permanent magnets, but all prior attempts to develop high coercivity in bulk alloys, especially coercivity combined with crystallographic texture, have fallen short of the expectations. This study was aimed at improvement of the currently best Sm(Fe,Co,Ti)₁₂ magnets prepared through melt-spinning which are inherently isotropic. Modifications of the alloys with B and Zr, already demonstrated in earlier studies to be effective separately, have been implemented simultaneously. Here, a systematic study of Sm_1.1-x(Fe,Co)_11.3-yTi_0.7B_y alloys melt-spun at a tangential speedmore »« less
https://doi.org/10.1016/j.jmmm.2021.167867

Full Text Available
The effect of refractory metals on the magnetic properties of {alpha}-Fe/R{sub 2}Fe{sub 14}B-type nanocomposites

Journal Article Chang, W C ; Wang, S H ; Chang, S J ; ... - IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers)

The phase transformations and magnetic properties of rare earth lean and boron rich (Nd{sub 0.95}La{sub 0.05}x)Fe{sub bal.}M{sub 2}B{sub 10.5}, where x = 9.5 or 11 and M = Cr, Ti, Nb, V, Mo, Zr, Hf, Ta, Mn or W, melt spun ribbons have been investigated. Two magnetic phases, namely {alpha}-Fe and R{sub 2}Fe{sub 14}B, were found in ribbons studied. A third magnetic phase, the R{sub 2}Fe{sub 23}B{sub 3}, was also detected in (Nd{sub 0.95}La{sub 0.05}){sub 9.5}Fe{sub 78}M{sub 2}B{sub 10.5} (M = Mo and Mn). Remanence (B{sub r}) and coercivity ({sub i}H{sub c}) values in the range of 8.0 to 9.1more »« less
https://doi.org/10.1109/20.800493

Similar Records

Title: Evolution of magnetic properties and microstructure of Hf2Co11B alloys

Abstract

Citation Formats

Hyperfine interactions at Ta impurities in cobalt and cobalt-hafnium intermetallic compounds journal, June 1993

${\rm HfCo}_{7}$-Based Rare-Earth-Free Permanent-Magnet Alloys journal, July 2013

Assembly of uniaxially aligned rare-earth-free nanomagnets journal, September 2012

Magnetic susceptibility of RCo 3 B 2 (R=Y, Sm, Gd, and Dy) journal, May 1994

High Steady Magnetic Field Processing of Functional Magnetic Materials journal, May 2013

Processing of non-ferromagnetic materials in strong static magnetic field journal, August 2013

Effects of Mo additive on structure and magnetic properties of Co82Zr18 alloy journal, April 2009

Hard magnetic phase in rapidly quenched Zr-Co-B alloys journal, January 1990

R 2 Fe 14 B materials: Intrinsic properties and technological aspects journal, October 1991

Strong static magnetic field processing of metallic materials: A review journal, October 2012

Thermomagnetic Processing of Liquid-Crystalline Epoxy Resins and Their Mechanical Characterization Using Nanoindentation journal, October 2014

Coercivity Enhancement in ${\rm Zr}_{2}{\rm Co}_{11}$-Based Nanocrystalline Materials Due to Mo Addition journal, November 2012

Magnetic properties enhancement of melt spun CoZrB ribbons by elemental substitutions journal, November 2013

A study on the magnetic properties of melt spun Co-Hf-Zr-B nanocomposite ribbons journal, May 2014

Magnetic properties, phase evolution, and coercivity mechanism of CoxZr98−xB2 (x=74−86) nanocomposites journal, May 2005

Cobalt-rich magnetic phases in Zr–Co alloys journal, October 2001

Hf–Co and Zr–Co alloys for rare-earth-free permanent magnets journal, January 2014

Single crystal studies on Co-containing τ-borides Co23−xMxB6 (M=Al, Ga, Sn, Ti, V, Ir) and the boron-rich τ-boride Co12.3Ir8.9B10.5 journal, March 2009

Hard magnetic property enhancement of Co 7 Hf-based ribbons by boron doping journal, November 2014

The exchange-spring magnet: a new material principle for permanent magnets journal, July 1991

Ab initio theoretical study of magnetization and phase stability of the ( Fe , Co , Ni ) 23 B 6 and ( Fe , Co , Ni ) 23 Zr 6 structures of Cr 23 C 6 and Mn 23 Th 6 prototypes journal, October 2008

Hard magnetic properties in melt-spun Co80Zr18−xMoxB2 alloys journal, April 2010

Differences in magnetic properties between amorphous and crystalline alloys journal, November 1982

Hard ferromagnetism in melt-spun Hf 2 Co 11 B alloys journal, November 2012

Structures of Zr 2 Co 11 and HfCo 7 intermetallic compounds journal, December 1991

The microstructure of a magnetically hard Zr2Co11 alloy journal, March 2009

High performance Co–Zr–B melt-spun ribbons journal, April 2003

Hf Doping Effect on Hard Magnetism of Nanocrystalline Zr$_{18\hbox{-}{\rm x}}$Hf$_{\rm x}$Co$_{82}$ Ribbons journal, July 2013

Current status of neodmium-iron-boron magnets journal, March 2000

Crystal structure of Zr2Co11 hard magnetic compound journal, April 2007

Novel Nanostructured Rare-Earth-Free Magnetic Materials with High Energy Products journal, August 2013

Rare earth-cobalt permanent magnets journal, November 1991

Microstructure versus magnetic properties correlations in melt-spun Hf-Zr-Co-Fe-B alloys: role of thermal treatment journal, June 2018

Hyperfine interactions at Ta impurities in cobalt and cobalt-hafnium intermetallic compounds
journal, June 1993

${\rm HfCo}_{7}$-Based Rare-Earth-Free Permanent-Magnet Alloys
journal, July 2013

Assembly of uniaxially aligned rare-earth-free nanomagnets
journal, September 2012

Magnetic susceptibility of RCo ₃ B ₂ (R=Y, Sm, Gd, and Dy)
journal, May 1994

High Steady Magnetic Field Processing of Functional Magnetic Materials
journal, May 2013

Processing of non-ferromagnetic materials in strong static magnetic field
journal, August 2013

Effects of Mo additive on structure and magnetic properties of Co82Zr18 alloy
journal, April 2009

Hard magnetic phase in rapidly quenched Zr-Co-B alloys
journal, January 1990

$R_{2}$ ${Fe}_{14}$ B materials: Intrinsic properties and technological aspects
journal, October 1991

Strong static magnetic field processing of metallic materials: A review
journal, October 2012

Thermomagnetic Processing of Liquid-Crystalline Epoxy Resins and Their Mechanical Characterization Using Nanoindentation
journal, October 2014

Coercivity Enhancement in ${\rm Zr}_{2}{\rm Co}_{11}$-Based Nanocrystalline Materials Due to Mo Addition
journal, November 2012

Magnetic properties enhancement of melt spun CoZrB ribbons by elemental substitutions
journal, November 2013

A study on the magnetic properties of melt spun Co-Hf-Zr-B nanocomposite ribbons
journal, May 2014

Magnetic properties, phase evolution, and coercivity mechanism of CoxZr98−xB2 (x=74−86) nanocomposites
journal, May 2005

Cobalt-rich magnetic phases in Zr–Co alloys
journal, October 2001

Hf–Co and Zr–Co alloys for rare-earth-free permanent magnets
journal, January 2014

Single crystal studies on Co-containing τ-borides Co23−xMxB6 (M=Al, Ga, Sn, Ti, V, Ir) and the boron-rich τ-boride Co12.3Ir8.9B10.5
journal, March 2009

Hard magnetic property enhancement of Co ₇ Hf-based ribbons by boron doping
journal, November 2014

The exchange-spring magnet: a new material principle for permanent magnets
journal, July 1991

Ab initio theoretical study of magnetization and phase stability of the ${(Fe, Co, Ni)}_{23} B_{6}$ and ${(Fe, Co, Ni)}_{23} {Zr}_{6}$ structures of ${Cr}_{23} C_{6}$ and ${Mn}_{23} {Th}_{6}$ prototypes
journal, October 2008

Hard magnetic properties in melt-spun Co80Zr18−xMoxB2 alloys
journal, April 2010

Differences in magnetic properties between amorphous and crystalline alloys
journal, November 1982

Hard ferromagnetism in melt-spun Hf ₂ Co ₁₁ B alloys
journal, November 2012

Structures of Zr ₂ Co ₁₁ and HfCo ₇ intermetallic compounds
journal, December 1991

The microstructure of a magnetically hard Zr2Co11 alloy
journal, March 2009

High performance Co–Zr–B melt-spun ribbons
journal, April 2003

Hf Doping Effect on Hard Magnetism of Nanocrystalline Zr$_{18\hbox{-}{\rm x}}$Hf$_{\rm x}$Co$_{82}$ Ribbons
journal, July 2013

Current status of neodmium-iron-boron magnets
journal, March 2000

Crystal structure of Zr2Co11 hard magnetic compound
journal, April 2007

Novel Nanostructured Rare-Earth-Free Magnetic Materials with High Energy Products
journal, August 2013

Rare earth-cobalt permanent magnets
journal, November 1991

Microstructure versus magnetic properties correlations in melt-spun Hf-Zr-Co-Fe-B alloys: role of thermal treatment
journal, June 2018