Synthesis and magnetism of single-phase Mn-Ga films

W. Y. Zhang; P. Kharel; S. Valloppilly; R. Skomski; D. J. Sellmyer

doi:10.1063/1.4908022

Synthesis and magnetism of single-phase Mn-Ga films

W. Y. Zhang, P. Kharel, S. Valloppilly, R. Skomski, D. J. Sellmyer

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

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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)]₅ multilayers deposited by e-beam evaporation. Mn-Ga alloys prepared in three different compositions Mn₂Ga₅ and Mn₂Ga were found to crystallize in the tetragonal tP14 and tP2 structures, respectively. Mn₃Ga crystallizes in the hexagonal hp8 or tetragonal tI8 structures. All three alloys show substantial magnetocrystalline anisotropy between 7 and 10 Mergs/cm³. The samples show hard magnetic properties including coercivities of Mn₂Ga₅ and Mn₂Ga about 12.0 kOe and of Mn₃Ga about 13.4 kOe. The saturation magnetization and Curie temperature of Mn₂Ga₅, Mn₂Ga, and Mn₃Ga are 183 emu/cm³ and 435 K, 342 emu/cm³ and 697 K, and 151 emu/cm³ and 798 K, respectively. The samples show metallic electron transport up to room temperature.

Original language	English (US)
Article number	17E306
Journal	Journal of Applied Physics
Volume	117
Issue number	17
DOIs	https://doi.org/10.1063/1.4908022
State	Published - May 7 2015

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General Physics and Astronomy

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@article{d2e3e832beee44029beb5f9c0e3695bf,

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)]5 multilayers deposited by e-beam evaporation. Mn-Ga alloys prepared in three different compositions Mn2Ga5 and Mn2Ga were found to crystallize in the tetragonal tP14 and tP2 structures, respectively. Mn3Ga crystallizes in the hexagonal hp8 or tetragonal tI8 structures. All three alloys show substantial magnetocrystalline anisotropy between 7 and 10 Mergs/cm3. The samples show hard magnetic properties including coercivities of Mn2Ga5 and Mn2Ga about 12.0 kOe and of Mn3Ga about 13.4 kOe. The saturation magnetization and Curie temperature of Mn2Ga5, Mn2Ga, and Mn3Ga are 183 emu/cm3 and 435 K, 342 emu/cm3 and 697 K, and 151 emu/cm3 and 798 K, respectively. The samples show metallic electron transport up to room temperature.",

author = "Zhang, {W. Y.} and P. Kharel and S. Valloppilly and R. Skomski and Sellmyer, {D. J.}",

note = "Publisher Copyright: {\textcopyright} 2015 AIP Publishing LLC.",

year = "2015",

month = may,

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doi = "10.1063/1.4908022",

language = "English (US)",

volume = "117",

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T1 - Synthesis and magnetism of single-phase Mn-Ga films

AU - Zhang, W. Y.

AU - Kharel, P.

AU - Valloppilly, S.

AU - Skomski, R.

AU - Sellmyer, D. J.

PY - 2015/5/7

Y1 - 2015/5/7

N2 - 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)]5 multilayers deposited by e-beam evaporation. Mn-Ga alloys prepared in three different compositions Mn2Ga5 and Mn2Ga were found to crystallize in the tetragonal tP14 and tP2 structures, respectively. Mn3Ga crystallizes in the hexagonal hp8 or tetragonal tI8 structures. All three alloys show substantial magnetocrystalline anisotropy between 7 and 10 Mergs/cm3. The samples show hard magnetic properties including coercivities of Mn2Ga5 and Mn2Ga about 12.0 kOe and of Mn3Ga about 13.4 kOe. The saturation magnetization and Curie temperature of Mn2Ga5, Mn2Ga, and Mn3Ga are 183 emu/cm3 and 435 K, 342 emu/cm3 and 697 K, and 151 emu/cm3 and 798 K, respectively. The samples show metallic electron transport up to room temperature.

AB - 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)]5 multilayers deposited by e-beam evaporation. Mn-Ga alloys prepared in three different compositions Mn2Ga5 and Mn2Ga were found to crystallize in the tetragonal tP14 and tP2 structures, respectively. Mn3Ga crystallizes in the hexagonal hp8 or tetragonal tI8 structures. All three alloys show substantial magnetocrystalline anisotropy between 7 and 10 Mergs/cm3. The samples show hard magnetic properties including coercivities of Mn2Ga5 and Mn2Ga about 12.0 kOe and of Mn3Ga about 13.4 kOe. The saturation magnetization and Curie temperature of Mn2Ga5, Mn2Ga, and Mn3Ga are 183 emu/cm3 and 435 K, 342 emu/cm3 and 697 K, and 151 emu/cm3 and 798 K, respectively. The samples show metallic electron transport up to room temperature.

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DO - 10.1063/1.4908022

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JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 17

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ER -

Synthesis and magnetism of single-phase Mn-Ga films

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