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Title: Synthesis and magnetism of single-phase Mn-Ga films

Abstract

Single-phase noncubic Mn-Ga films with a thickness of about 200 nm were fabricated by an in situ annealing of [Mn(x)/Ga(y)/Mn(x)]{sub 5} multilayers deposited by e-beam evaporation. Mn-Ga alloys prepared in three different compositions Mn{sub 2}Ga{sub 5} and Mn{sub 2}Ga were found to crystallize in the tetragonal tP14 and tP2 structures, respectively. Mn{sub 3}Ga crystallizes in the hexagonal hp8 or tetragonal tI8 structures. All three alloys show substantial magnetocrystalline anisotropy between 7 and 10 Mergs/cm{sup 3}. The samples show hard magnetic properties including coercivities of Mn{sub 2}Ga{sub 5} and Mn{sub 2}Ga about 12.0 kOe and of Mn{sub 3}Ga about 13.4 kOe. The saturation magnetization and Curie temperature of Mn{sub 2}Ga{sub 5}, Mn{sub 2}Ga, and Mn{sub 3}Ga are 183 emu/cm{sup 3} and 435 K, 342 emu/cm{sup 3} and 697 K, and 151 emu/cm{sup 3} and 798 K, respectively. The samples show metallic electron transport up to room temperature.

Authors:
; ;  [1];  [2];  [1];  [2];  [1]
  1. Nebraska Center for Materials and Nanoscience, University of Nebraska, Lincoln, Nebraska 68588 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
22410145
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANNEALING; COERCIVE FORCE; CURIE POINT; ELECTRON BEAMS; ENERGY BEAM DEPOSITION; EVAPORATION; FILMS; GALLIUM; HEXAGONAL LATTICES; INTERMETALLIC COMPOUNDS; LAYERS; MAGNETIC PROPERTIES; MAGNETISM; MAGNETIZATION; MANGANESE; SYNTHESIS; TEMPERATURE RANGE 0273-0400 K; TETRAGONAL LATTICES

Citation Formats

Zhang, W. Y., E-mail: wenyong.zhang@unl.edu, Skomski, R., Sellmyer, D. J., Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588, Kharel, P., Department of Physics, South Dakota State University, Brookings, South Dakota 57007, and Valloppilly, S. Synthesis and magnetism of single-phase Mn-Ga films. United States: N. p., 2015. Web. doi:10.1063/1.4908022.
Zhang, W. Y., E-mail: wenyong.zhang@unl.edu, Skomski, R., Sellmyer, D. J., Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588, Kharel, P., Department of Physics, South Dakota State University, Brookings, South Dakota 57007, & Valloppilly, S. Synthesis and magnetism of single-phase Mn-Ga films. United States. doi:10.1063/1.4908022.
Zhang, W. Y., E-mail: wenyong.zhang@unl.edu, Skomski, R., Sellmyer, D. J., Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588, Kharel, P., Department of Physics, South Dakota State University, Brookings, South Dakota 57007, and Valloppilly, S. Thu . "Synthesis and magnetism of single-phase Mn-Ga films". United States. doi:10.1063/1.4908022.
@article{osti_22410145,
title = {Synthesis and magnetism of single-phase Mn-Ga films},
author = {Zhang, W. Y., E-mail: wenyong.zhang@unl.edu and Skomski, R. and Sellmyer, D. J. and Department of Physics and Astronomy, University of Nebraska, Lincoln, Nebraska 68588 and Kharel, P. and Department of Physics, South Dakota State University, Brookings, South Dakota 57007 and Valloppilly, S.},
abstractNote = {Single-phase noncubic Mn-Ga films with a thickness of about 200 nm were fabricated by an in situ annealing of [Mn(x)/Ga(y)/Mn(x)]{sub 5} multilayers deposited by e-beam evaporation. Mn-Ga alloys prepared in three different compositions Mn{sub 2}Ga{sub 5} and Mn{sub 2}Ga were found to crystallize in the tetragonal tP14 and tP2 structures, respectively. Mn{sub 3}Ga crystallizes in the hexagonal hp8 or tetragonal tI8 structures. All three alloys show substantial magnetocrystalline anisotropy between 7 and 10 Mergs/cm{sup 3}. The samples show hard magnetic properties including coercivities of Mn{sub 2}Ga{sub 5} and Mn{sub 2}Ga about 12.0 kOe and of Mn{sub 3}Ga about 13.4 kOe. The saturation magnetization and Curie temperature of Mn{sub 2}Ga{sub 5}, Mn{sub 2}Ga, and Mn{sub 3}Ga are 183 emu/cm{sup 3} and 435 K, 342 emu/cm{sup 3} and 697 K, and 151 emu/cm{sup 3} and 798 K, respectively. The samples show metallic electron transport up to room temperature.},
doi = {10.1063/1.4908022},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 17,
volume = 117,
place = {United States},
year = {2015},
month = {5}
}