Ba0.4Rb0.6Mn2As2: A prototype half-metallic ferromagnet

Pandey, Abhishek; Johnston, D. C.

doi:10.1103/PhysRevB.92.174401

${Ba}_{0.4} {Rb}_{0.6} {Mn}_{2} {As}_{2}$ : A prototype half-metallic ferromagnet

Journal Article · Mon Nov 02 00:00:00 EST 2015 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PhysRevB.92.174401· OSTI ID:1350055

Pandey, Abhishek ^[1]; Johnston, D. C. ^[1]

Ames Lab. and Iowa State Univ., Ames, IA (United States)

Half-metallic ferromagnetism (FM) in single-crystal Ba_0.39(1)Rb_0.61(1)Mn₂As₂ below its Curie temperature T_C = 103(2) K is reported. The magnetization M versus applied magnetic field H isotherm data at 1.8 K show complete polarization of the itinerant doped-hole magnetic moments that are introduced by substituting Rb for Ba. Here, the material exhibits extremely soft FM, with unobservably small remanent magnetization and coercive field. Surprisingly, and contrary to typical itinerant FMs, the M(H) data follow the Arrott-plot paradigm that is based on a mean-field theory of local-moment FMs. The in-plane electrical resistivity data are fitted well by an activated-T² expression for T ≤ T_C, whereas the data sharply deviate from this model for T > T_C. Hence the activated-T² resistivity model is an excellent diagnostic for determining the onset of half-metallic FM in this compound, which in turn demonstrates the presence of a strong correlation between the electronic transport and magnetic properties of the material. Together with previous data on 40% hole-doped Ba_0.6K_0.4Mn₂As₂, these measurements establish 61%-doped Ba_0.39Rb_0.61Mn₂As₂ as a prototype for a class of half-metallic ferromagnets in which all the itinerant carriers in the material are ferromagnetic.

View Accepted Manuscript (DOE)

Research Organization:: Ames Laboratory (AMES), Ames, IA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 1350055

Alternate ID(s):: OSTI ID: 1224866

Report Number(s):: IS-J--8848; PII: S1090780717300101

Journal Information:: Physical Review. B, Condensed Matter and Materials Physics, Journal Name: Physical Review. B, Condensed Matter and Materials Physics Journal Issue: 17 Vol. 92; ISSN 1098-0121; ISSN PRBMDO

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

References (35)

Magnetic excitations in the half-metallic NiMnSb ferromagnet: From Heisenberg-type to itinerant behaviour Hordequin, C.; Pierre, J.; Currat, R. Journal of Magnetism and Magnetic Materials, Vol. 162, Issue 1 https://doi.org/10.1016/0304-8853(96)00074-1	journal	September 1996
Recent advances in magnetic structure determination by neutron powder diffraction Rodríguez-Carvajal, Juan Physica B: Condensed Matter, Vol. 192, Issue 1-2 https://doi.org/10.1016/0921-4526(93)90108-I	journal	October 1993
Equations of state along the road to Arrott's last plot Arrott, A. S. Journal of Magnetism and Magnetic Materials, Vol. 322, Issue 9-12 https://doi.org/10.1016/j.jmmm.2009.06.044	journal	May 2010
Simple rules for the understanding of Heusler compounds Graf, Tanja; Felser, Claudia; Parkin, Stuart S. P. Progress in Solid State Chemistry, Vol. 39, Issue 1 https://doi.org/10.1016/j.progsolidstchem.2011.02.001	journal	May 2011
Iron-Based Layered Superconductor La[O _1- _x F _x ]FeAs ( x = 0.05−0.12) with T _c = 26 K Kamihara, Yoichi; Watanabe, Takumi; Hirano, Masahiro Journal of the American Chemical Society, Vol. 130, Issue 11 https://doi.org/10.1021/ja800073m	journal	March 2008
Direct evidence for a half-metallic ferromagnet Park, J. -H.; Vescovo, E.; Kim, H. -J. Nature, Vol. 392, Issue 6678 https://doi.org/10.1038/33883	journal	April 1998
High-temperature superconductivity in iron-based materials Paglione, Johnpierre; Greene, Richard L. Nature Physics, Vol. 6, Issue 9 https://doi.org/10.1038/nphys1759	journal	August 2010
Half-metallic ferromagnetism: Example of CrO[sub 2] (invited) Coey, J. M. D.; Venkatesan, M. Journal of Applied Physics, Vol. 91, Issue 10 https://doi.org/10.1063/1.1447879	journal	January 2002
The puzzle of high temperature superconductivity in layered iron pnictides and chalcogenides Johnston, David C. Advances in Physics, Vol. 59, Issue 6 https://doi.org/10.1080/00018732.2010.513480	journal	October 2010
Magnetic Isotherm of Itinerant Electron Magnets – A New Approach to Itinerant Electron Metamagnetism Takahashi, Yoshinori Journal of Physics: Conference Series, Vol. 344 https://doi.org/10.1088/1742-6596/344/1/012002	journal	March 2012
Criterion for Ferromagnetism from Observations of Magnetic Isotherms Arrott, Anthony Physical Review, Vol. 108, Issue 6 https://doi.org/10.1103/PhysRev.108.1394	journal	December 1957
Positron-annihilation study of the half-metallic ferromagnet NiMnSb: Experiment Hanssen, K. E. H. M.; Mijnarends, P. E.; Rabou, L. P. L. M. Physical Review B, Vol. 42, Issue 3 https://doi.org/10.1103/PhysRevB.42.1533	journal	July 1990
Magnetic, structural, and transport properties of the Heusler alloys Co 2 MnSi and NiMnSb Ritchie, Lance; Xiao, Gang; Ji, Y. Physical Review B, Vol. 68, Issue 10 https://doi.org/10.1103/PhysRevB.68.104430	journal	September 2003
Electronic structure and magnetism in BaMn 2 As 2 and BaMn 2 Sb 2 An, Jiming; Sefat, A. S.; Singh, D. J. Physical Review B, Vol. 79, Issue 7 https://doi.org/10.1103/PhysRevB.79.075120	journal	February 2009
Magnetic, transport, and thermal properties of single crystals of the layered arsenide BaMn 2 As 2 Singh, Yogesh; Ellern, A.; Johnston, D. C. Physical Review B, Vol. 79, Issue 9 https://doi.org/10.1103/PhysRevB.79.094519	journal	March 2009
Weak itinerant ferromagnetism in Heusler-type Fe 2 VAl 0.95 Sato, K.; Naka, T.; Taguchi, M. Physical Review B, Vol. 82, Issue 10 https://doi.org/10.1103/PhysRevB.82.104408	journal	September 2010
Magnetic exchange interactions in BaMn 2 As 2 : A case study of the J 1 - J 2 - J c Heisenberg model Johnston, D. C.; McQueeney, R. J.; Lake, B. Physical Review B, Vol. 84, Issue 9 https://doi.org/10.1103/PhysRevB.84.094445	journal	September 2011
Pressure-induced metallization of BaMn 2 As 2 Satya, A. T.; Mani, Awadhesh; Arulraj, A. Physical Review B, Vol. 84, Issue 18 https://doi.org/10.1103/PhysRevB.84.180515	journal	November 2011
Weakly ferromagnetic metallic state in heavily doped Ba 1 − x K x Mn 2 As 2 Bao, Jin-Ke; Jiang, Hao; Sun, Yun-Lei Physical Review B, Vol. 85, Issue 14 https://doi.org/10.1103/PhysRevB.85.144523	journal	April 2012
Complex itinerant ferromagnetism in noncentrosymmetric Cr 11 Ge 19 Ghimire, N. J.; McGuire, M. A.; Parker, D. S. Physical Review B, Vol. 85, Issue 22 https://doi.org/10.1103/PhysRevB.85.224405	journal	June 2012
Persistence of local-moment antiferromagnetic order in Ba 1 − x K x Mn 2 As 2 Lamsal, J.; Tucker, G. S.; Heitmann, T. W. Physical Review B, Vol. 87, Issue 14 https://doi.org/10.1103/PhysRevB.87.144418	journal	April 2013
Crystallographic, electronic, thermal, and magnetic properties of single-crystal SrCo 2 As 2 Pandey, Abhishek; Quirinale, D. G.; Jayasekara, W. Physical Review B, Vol. 88, Issue 1 https://doi.org/10.1103/PhysRevB.88.014526	journal	July 2013
Metal-insulator transition in antiferromagnetic Ba 1 − x K x Mn 2 As 2 ( 0 ≤ x ≤ 0.4 ) single crystals studied by 55 Mn and 75 As NMR Yeninas, S.; Pandey, Abhishek; Ogloblichev, V. Physical Review B, Vol. 88, Issue 24 https://doi.org/10.1103/PhysRevB.88.241111	journal	December 2013
First-principles evidence of Mn moment canting in hole-doped Ba 1 − 2 x K 2 x Mn 2 As 2 Glasbrenner, J. K.; Mazin, I. I. Physical Review B, Vol. 89, Issue 6 https://doi.org/10.1103/PhysRevB.89.060403	journal	February 2014
Ba 1 − x K x Mn 2 As 2 : An Antiferromagnetic Local-Moment Metal Pandey, Abhishek; Dhaka, R. S.; Lamsal, J. Physical Review Letters, Vol. 108, Issue 8 https://doi.org/10.1103/PhysRevLett.108.087005	journal	February 2012
Half-Metallic Ferromagnetism with Unexpectedly Small Spin Splitting in the Heusler Compound Co 2 FeSi Bombor, Dirk; Blum, Christian G. F.; Volkonskiy, Oleg Physical Review Letters, Vol. 110, Issue 6 https://doi.org/10.1103/PhysRevLett.110.066601	journal	February 2013
Coexistence of Half-Metallic Itinerant Ferromagnetism with Local-Moment Antiferromagnetism in Ba 0.60 K 0.40 Mn 2 As 2 Pandey, Abhishek; Ueland, B. G.; Yeninas, S. Physical Review Letters, Vol. 111, Issue 4 https://doi.org/10.1103/PhysRevLett.111.047001	journal	July 2013
Stripe Antiferromagnetic Spin Fluctuations in SrCo 2 As 2 Jayasekara, W.; Lee, Y.; Pandey, Abhishek Physical Review Letters, Vol. 111, Issue 15 https://doi.org/10.1103/PhysRevLett.111.157001	journal	October 2013
Itinerant Ferromagnetism in the As 4 p Conduction Band of Ba 0.6 K 0.4 Mn 2 As 2 Identified by X-Ray Magnetic Circular Dichroism Ueland, B. G.; Pandey, Abhishek; Lee, Y. Physical Review Letters, Vol. 114, Issue 21 https://doi.org/10.1103/PhysRevLett.114.217001	journal	May 2015
New Class of Materials: Half-Metallic Ferromagnets de Groot, R. A.; Mueller, F. M.; Engen, P. G. van Physical Review Letters, Vol. 50, Issue 25 https://doi.org/10.1103/PhysRevLett.50.2024	journal	June 1983
Magnetoresistance of Chromium Dioxide Powder Compacts Coey, J. M. D.; Berkowitz, A. E.; Balcells, Ll. Physical Review Letters, Vol. 80, Issue 17 https://doi.org/10.1103/PhysRevLett.80.3815	journal	April 1998
Half-metallic ferromagnets: From band structure to many-body effects Katsnelson, M. I.; Irkhin, V. Yu.; Chioncel, L. Reviews of Modern Physics, Vol. 80, Issue 2 https://doi.org/10.1103/RevModPhys.80.315	journal	April 2008
Superconductivity in iron compounds Stewart, G. R. Reviews of Modern Physics, Vol. 83, Issue 4 https://doi.org/10.1103/RevModPhys.83.1589	journal	December 2011
Effect of Spin Fluctuations on the Specific Heat of Weakly and Nearly Ferromagnetic Metals Makoshi, Kenji; Moriya, Tôru Journal of the Physical Society of Japan, Vol. 38, Issue 1 https://doi.org/10.1143/JPSJ.38.10	journal	January 1975
Electrical Resistance of Ferromagnetic Metals Mannari, I. Progress of Theoretical Physics, Vol. 22, Issue 3 https://doi.org/10.1143/PTP.22.335	journal	September 1959

Cited By (2)

Importance of effective dimensionality in manganese pnictides Zingl, Manuel; Assmann, Elias; Seth, Priyanka Physical Review B, Vol. 94, Issue 4 https://doi.org/10.1103/physrevb.94.045130	journal	July 2016
Magnetic hexadecapole order and magnetopiezoelectric metal state in Ba 1 − x K x Mn 2 As 2 Watanabe, Hikaru; Yanase, Youichi Physical Review B, Vol. 96, Issue 6 https://doi.org/10.1103/physrevb.96.064432	journal	August 2017