Effect of Pt substitution on the magnetocrystalline anisotropy of Ni2MnGa: A competition between chemistry and elasticity

Effect of Pt substitution on the magnetocrystalline anisotropy of Ni2MnGa: A competition between... The magnetocrystalline anisotropy (MAE) of Ni2−xPtxMnGa(0≤x≤0.25) alloys are investigated using the singular point detection technique and density functional theory. A slight reduction in MAE as compared to that of Ni2MnGa is observed due to Pt substitution. The calculated MAE varies almost linearly with the orbital moment anisotropy. A competition between the elastic and the chemical contributions explains the observed trend of the MAE with increasing Pt content. The large MAE in combination with the previously reported increase of the martensitic transition temperature makes these alloys promising candidates for ferromagnetic shape memory applications near room temperature. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review B American Physical Society (APS)

Effect of Pt substitution on the magnetocrystalline anisotropy of Ni2MnGa: A competition between chemistry and elasticity

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Effect of Pt substitution on the magnetocrystalline anisotropy of Ni2MnGa: A competition between chemistry and elasticity

Abstract

The magnetocrystalline anisotropy (MAE) of Ni2−xPtxMnGa(0≤x≤0.25) alloys are investigated using the singular point detection technique and density functional theory. A slight reduction in MAE as compared to that of Ni2MnGa is observed due to Pt substitution. The calculated MAE varies almost linearly with the orbital moment anisotropy. A competition between the elastic and the chemical contributions explains the observed trend of the MAE with increasing Pt content. The large MAE in combination with the previously reported increase of the martensitic transition temperature makes these alloys promising candidates for ferromagnetic shape memory applications near room temperature.
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Publisher
The American Physical Society
Copyright
Copyright © ©2017 American Physical Society
ISSN
1098-0121
eISSN
1550-235X
D.O.I.
10.1103/PhysRevB.96.054105
Publisher site
See Article on Publisher Site

Abstract

The magnetocrystalline anisotropy (MAE) of Ni2−xPtxMnGa(0≤x≤0.25) alloys are investigated using the singular point detection technique and density functional theory. A slight reduction in MAE as compared to that of Ni2MnGa is observed due to Pt substitution. The calculated MAE varies almost linearly with the orbital moment anisotropy. A competition between the elastic and the chemical contributions explains the observed trend of the MAE with increasing Pt content. The large MAE in combination with the previously reported increase of the martensitic transition temperature makes these alloys promising candidates for ferromagnetic shape memory applications near room temperature.

Journal

Physical Review BAmerican Physical Society (APS)

Published: Aug 7, 2017

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