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Title: An effective route for the fabrication of rare earth-iron-boron thin films having strong c-axis texture and excellent hard magnetic properties

Abstract

Rare-earth iron-boron (RE-Fe-B) thin films with a c-axis texture were prepared on a Ta (110) buffer layer on thermally oxidized Si substrates by dc magnetron sputtering. The microstructure, magnetic structure, and magnetic properties of these films were studied as a function of the deposition temperature. The results show that c-axis texture can be obtained over a wide range of deposition temperatures and that the degree of c-axis orientation improves with deposition temperature. It was established that deposition of a RE-Fe-B thin film to obtain grains with a strong c-axis RE{sub 2}Fe{sub 14}B texture, coexisting with an amorphous phase, followed by annealing at higher temperature, is an effective route for obtaining excellent hard magnetic properties. Initial results show that a film, which was deposited at 470 deg. C and annealed at 590 deg. C, had a high perpendicular coercivity of 1.8 T, in combination with a large maximum energy product of 238 kJ/m{sup 3}.

Authors:
; ; ; ; ;  [1];  [2]
  1. Centre for Advanced Magnetic Materials and Devices, Department of Engineering Materials, University of Sheffield, Sheffield S1 3JD (United Kingdom) and National Laboratory of Solid State Microstructures, Department of Physics, Nanjing University, Nanjing, 210093 (China)
  2. (United Kingdom)
Publication Date:
OSTI Identifier:
20884969
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 101; Journal Issue: 1; Other Information: DOI: 10.1063/1.2424539; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; AMORPHOUS STATE; ANNEALING; BORON ALLOYS; COERCIVE FORCE; CRYSTAL STRUCTURE; DEPOSITION; FABRICATION; IRON ALLOYS; MAGNETIC PROPERTIES; MICROSTRUCTURE; OXIDATION; PERMANENT MAGNETS; RARE EARTH ALLOYS; SILICON; SPUTTERING; TANTALUM; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0400-1000 K; TEXTURE; THIN FILMS

Citation Formats

Tang, S. L., Gibbs, M. R. J., Davies, H. A., Liu, Z. W., Lane, S. C., Mateen, N. E., and Centre for Advanced Magnetic Materials and Devices, Department of Engineering Materials, University of Sheffield, Sheffield S1 3JD. An effective route for the fabrication of rare earth-iron-boron thin films having strong c-axis texture and excellent hard magnetic properties. United States: N. p., 2007. Web. doi:10.1063/1.2424539.
Tang, S. L., Gibbs, M. R. J., Davies, H. A., Liu, Z. W., Lane, S. C., Mateen, N. E., & Centre for Advanced Magnetic Materials and Devices, Department of Engineering Materials, University of Sheffield, Sheffield S1 3JD. An effective route for the fabrication of rare earth-iron-boron thin films having strong c-axis texture and excellent hard magnetic properties. United States. doi:10.1063/1.2424539.
Tang, S. L., Gibbs, M. R. J., Davies, H. A., Liu, Z. W., Lane, S. C., Mateen, N. E., and Centre for Advanced Magnetic Materials and Devices, Department of Engineering Materials, University of Sheffield, Sheffield S1 3JD. Mon . "An effective route for the fabrication of rare earth-iron-boron thin films having strong c-axis texture and excellent hard magnetic properties". United States. doi:10.1063/1.2424539.
@article{osti_20884969,
title = {An effective route for the fabrication of rare earth-iron-boron thin films having strong c-axis texture and excellent hard magnetic properties},
author = {Tang, S. L. and Gibbs, M. R. J. and Davies, H. A. and Liu, Z. W. and Lane, S. C. and Mateen, N. E. and Centre for Advanced Magnetic Materials and Devices, Department of Engineering Materials, University of Sheffield, Sheffield S1 3JD},
abstractNote = {Rare-earth iron-boron (RE-Fe-B) thin films with a c-axis texture were prepared on a Ta (110) buffer layer on thermally oxidized Si substrates by dc magnetron sputtering. The microstructure, magnetic structure, and magnetic properties of these films were studied as a function of the deposition temperature. The results show that c-axis texture can be obtained over a wide range of deposition temperatures and that the degree of c-axis orientation improves with deposition temperature. It was established that deposition of a RE-Fe-B thin film to obtain grains with a strong c-axis RE{sub 2}Fe{sub 14}B texture, coexisting with an amorphous phase, followed by annealing at higher temperature, is an effective route for obtaining excellent hard magnetic properties. Initial results show that a film, which was deposited at 470 deg. C and annealed at 590 deg. C, had a high perpendicular coercivity of 1.8 T, in combination with a large maximum energy product of 238 kJ/m{sup 3}.},
doi = {10.1063/1.2424539},
journal = {Journal of Applied Physics},
number = 1,
volume = 101,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}
  • Bismuth-doped lutetium iron garnet (BLIG) is an important material for implementation of the interaction between magnetostatic waves and optical guided modes. Sodium oxide is suggested to reduce the viscosity of the lead-free melt used for liquid-phase epitaxy (LPE) growth of the films, improving flux removal. The effect of the incorporation of sodium into the garnet lattice on the important magnetic and magneto-optic properties is studied, using yttrium iron garnet as a model system. Negligible effect on the Faraday rotation and magnetostatic wave passband is noted. The uniaxial anisotropy field is affected in the negative direction by a growth induced anisotropymore » due to sodium inclusion, but this effect may be removed by annealing.« less
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  • No abstract prepared.
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