Modification of structure and magnetic anisotropy of epitaxial CoFe₂O₄ films by hydrogen reduction

Chen, Aiping; Poudyal, Narayan; Xiong, Jie; Liu, J. Ping; Jia, Quanxi

doi:10.1063/1.4915504

Title: Modification of structure and magnetic anisotropy of epitaxial CoFe₂O₄ films by hydrogen reduction

Journal Article · Mon Mar 16 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4915504· OSTI ID:1193448

^[1]; Poudyal, Narayan ^[2]; Xiong, Jie ^[1]; Liu, J. Ping ^[2]; Jia, Quanxi ^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies (CINT)
Univ. of Texas, Arlington, TX (United States). Dept. of Physics

Heteroepitaxial CoFe₂O₄ (CFO) thin films with different thicknesses were deposited on MgO (001) substrates. The as-deposited CFO films show a clear switching of magnetic anisotropy with increasing film thickness. The thinner films (<100 nm) show a perpendicular magnetic anisotropy due to the out-of-plane compressive strain. The thicker films exhibit an in-plane easy axis owing to the dominating shape anisotropy effect. The magnetostriction coefficient of CFO films is estimated to be λ[001] =-188 × 10⁻⁶. Metallic CoFe₂ films were obtained by annealing the as-deposited CFO films in forming gas (Ar 93% + H₂ 7%) at 450 °C. XRD shows that CoFe₂ films are textured out-of-plane and aligned in-plane, owing to lattice matching between CoFe₂ and MgO substrate. TEM results indicate that as-deposited films are continuous while the annealed films exhibit a nanopore mushroom structure. The magnetic anisotropy of CoFe₂ films is dominated by the shape effect. The results demonstrate that hydrogen reduction can be effectively used to modify microstructures and physical properties of complex metal oxide materials.

View Accepted Manuscript (DOE)

Cite

Export

Save

Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC52-06NA25396; W911NF-11-1-0507

OSTI ID:: 1193448

Report Number(s):: LA/UR-15-20894; APPLAB

Journal Information:: Applied Physics Letters, Vol. 106, Issue 11; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 8 works

Citation information provided by
Web of Science

References (18)

Epitaxial P-Type Germanium and Silicon Films by the Hydrogen Reduction of GeBr[sub 4], SiBr[sub 4], and BBr[sub 3] Miller, K. J.; Grieco, M. J. Journal of The Electrochemical Society, Vol. 110, Issue 12 https://doi.org/10.1149/1.2425635	journal	January 1963
Reduction of FeO/Pt(111) thin films by exposure to atomic hydrogen Knudsen, Jan; Merte, Lindsay R.; Grabow, Lars C. Surface Science, Vol. 604, Issue 1 https://doi.org/10.1016/j.susc.2009.10.008	journal	January 2010
The reduction of copper oxide thin films with hydrogen plasma generated by an atmospheric-pressure glow discharge Sawada, Yasushi; Tamaru, Hiroshi; Kogoma, Masuhiro Journal of Physics D: Applied Physics, Vol. 29, Issue 10 https://doi.org/10.1088/0022-3727/29/10/003	journal	October 1996
Reduction of graphene oxide films on Al foil for hybrid transparent conductive film applications Domingues, Sergio H.; Kholmanov, Iskandar N.; Kim, TaeYoung Carbon, Vol. 63 https://doi.org/10.1016/j.carbon.2013.07.007	journal	November 2013
Engineered Magnetic Shape Anisotropy in BiFeO ₃ –CoFe ₂ O ₄ Self-Assembled Thin Films Wang, Zhiguang; Li, Yanxi; Viswan, Ravindranath ACS Nano, Vol. 7, Issue 4 https://doi.org/10.1021/nn4003506	journal	March 2013
Strain relaxation and enhanced perpendicular magnetic anisotropy in BiFeO ₃ :CoFe ₂ O ₄ vertically aligned nanocomposite thin films Zhang, Wenrui; Jian, Jie; Chen, Aiping Applied Physics Letters, Vol. 104, Issue 6 https://doi.org/10.1063/1.4864405	journal	February 2014
Stress-induced magnetic anisotropy of CoFe2O4 thin films using pulsed laser deposition Thang, P. D.; Rijnders, G.; Blank, D. H. A. Journal of Magnetism and Magnetic Materials, Vol. 310, Issue 2 https://doi.org/10.1016/j.jmmm.2006.11.048	journal	March 2007
Spin valves using insulating cobalt ferrite exchange-spring pinning layers Carey, M. J.; Maat, S.; Rice, P. Applied Physics Letters, Vol. 81, Issue 6 https://doi.org/10.1063/1.1494859	journal	August 2002
Crossover of uniaxial magnetic anisotropy direction mediated by interfacial strain of CoFe2O4 films Cho, C. -W.; Lee, D. Y.; Bae, J. S. Journal of Magnetism and Magnetic Materials, Vol. 368 https://doi.org/10.1016/j.jmmm.2014.05.038	journal	November 2014
Role of crystal orientation on the magnetic properties of CoFe2O4 thin films grown on Si (100) and Al2O3 (0001) substrates using pulsed laser deposition Mukherjee, Devajyoti; Dhakal, Tara; Phan, Manh-Huong Physica B: Condensed Matter, Vol. 406, Issue 13 https://doi.org/10.1016/j.physb.2011.03.080	journal	July 2011
Reorientation of magnetic anisotropy in epitaxial cobalt ferrite thin films Lisfi, A.; Williams, C. M.; Nguyen, L. T. Physical Review B, Vol. 76, Issue 5 https://doi.org/10.1103/PhysRevB.76.054405	journal	August 2007
Magnetic anisotropy and domain structure in epitaxial CoFe2O4 thin films Lisfi, A.; Williams, C. M. Journal of Applied Physics, Vol. 93, Issue 10 https://doi.org/10.1063/1.1541651	journal	May 2003
Restoration of bulk magnetic properties by strain engineering in epitaxial CoFe ₂ O ₄ (001) ultrathin films Matzen, S.; Moussy, J. -B.; Mattana, R. Applied Physics Letters, Vol. 99, Issue 5 https://doi.org/10.1063/1.3622307	journal	August 2011
Epitaxial growth of TiO2 thin films on SrTiO3, LaAlO3 and yttria-stabilized zirconia substrates by electron beam evaporation Lotnyk, A.; Senz, S.; Hesse, D. Thin Solid Films, Vol. 515, Issue 7-8 https://doi.org/10.1016/j.tsf.2006.10.106	journal	February 2007
Textured metastable VO ₂ (B) thin films on SrTiO ₃ substrates with significantly enhanced conductivity Chen, Aiping; Bi, Zhenxing; Zhang, Wenrui Applied Physics Letters, Vol. 104, Issue 7 https://doi.org/10.1063/1.4865898	journal	February 2014
Sharp semiconductor-to-metal transition of VO ₂ thin films on glass substrates Jian, Jie; Chen, Aiping; Zhang, Wenrui Journal of Applied Physics, Vol. 114, Issue 24 https://doi.org/10.1063/1.4851655	journal	December 2013
Role of epitaxy in controlling the magnetic and magnetostrictive properties of cobalt ferrite–PZT bilayers Mukherjee, D.; Dhakal, T.; Hyde, R. Journal of Physics D: Applied Physics, Vol. 43, Issue 48 https://doi.org/10.1088/0022-3727/43/48/485001	journal	November 2010
Magnetic anisotropy and high coercivity of epitaxial Co-ferrite films prepared by pulsed laser deposition Yin, J. H.; Ding, J.; Liu, B. H. Journal of Applied Physics, Vol. 101, Issue 9 https://doi.org/10.1063/1.2709763	journal	May 2007

Cited By (2)

Metal Oxide Nanocomposites: A Perspective from Strain, Defect, and Interface Chen, Aiping; Su, Qing; Han, Hyungkyu Advanced Materials, Vol. 31, Issue 4 https://doi.org/10.1002/adma.201803241	journal	October 2018
Phase-transition-induced large magnetic anisotropy change in VO ₂ /(Co/Pt) ₂ heterostructure Wei, Guodong; Lin, Xiaoyang; Si, Zhizhong Applied Physics Letters, Vol. 114, Issue 1 https://doi.org/10.1063/1.5058751	journal	January 2019

Similar Records

Magnetoelectricity of CoFe₂O₄ and tetragonal phase BiFeO₃ nanocomposites prepared by pulsed laser deposition

Journal Article · Wed Jan 10 00:00:00 EST 2018 · Scientific Reports · OSTI ID:1193448

Gao, Min; Viswan, Ravindranath; Tang, Xiao; +3 more

Strain relaxation and enhanced perpendicular magnetic anisotropy in BiFeO{sub 3}:CoFe{sub 2}O{sub 4} vertically aligned nanocomposite thin films

Journal Article · Mon Feb 10 00:00:00 EST 2014 · Applied Physics Letters · OSTI ID:1193448

Zhang, Wenrui; Jiao, Liang; Li, Leigang; +7 more

Magnetic anisotropy in composite CoFe{sub 2}O{sub 4}-BiFeO{sub 3} ultrathin films grown by pulsed-electron deposition

Journal Article · Sun Apr 01 00:00:00 EDT 2012 · Journal of Applied Physics · OSTI ID:1193448

Comes, Ryan; Liu, Hongxue; Lu, Jiwei; +2 more

Related Subjects

36 MATERIALS SCIENCE
magnetic anisotropy
magnetic films
epitaxy

Title: Modification of structure and magnetic anisotropy of epitaxial CoFe₂O₄ films by hydrogen reduction

Citation Formats

References (18)

Cited By (2)

Similar Records

Related Subjects