Forced magnetostriction of ferromagnetic Heusler alloy Ni2MnGa at the Curie temperature

T. Sakon; Y. Hayashi; N. Fujimoto; T. Kanomata; H. Nojiri; Y. Adachi

doi:10.1063/1.5036558

Forced magnetostriction of ferromagnetic Heusler alloy Ni₂MnGa at the Curie temperature

T. Sakon, Y. Hayashi, N. Fujimoto, T. Kanomata, H. Nojiri, Y. Adachi

Institute for Materials Research (IMR)

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

8 Citations (Scopus)

Abstract

An investigation on the relationship between magnetostriction and magnetization by means of the self-consistent renormalization (SCR) theory of an itinerant ferromagnet was performed for Ni₂MnGa alloy. The magnetization results at the Curie temperature T_C suggest that the critical index δ of H - M^δ is 4.7-5.0, and this confirms Takahashi's spin fluctuation theory and the result of Nishihara et al. As a result, at T_C, the relation between magnetostriction and M² deviates from proportionality and the magnetostriction is proportional to M⁴. At T_C, the plot of ΔL/L vs M⁴ crossed the point of origin. This result is in accordance with Takahashi's spin fluctuation theory.

Original language	English
Article number	213902
Journal	Journal of Applied Physics
Volume	123
Issue number	21
DOIs	https://doi.org/10.1063/1.5036558
Publication status	Published - 2018 Jun 7

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "Forced magnetostriction of ferromagnetic Heusler alloy Ni2MnGa at the Curie temperature",

abstract = "An investigation on the relationship between magnetostriction and magnetization by means of the self-consistent renormalization (SCR) theory of an itinerant ferromagnet was performed for Ni2MnGa alloy. The magnetization results at the Curie temperature TC suggest that the critical index δ of H - Mδ is 4.7-5.0, and this confirms Takahashi's spin fluctuation theory and the result of Nishihara et al. As a result, at TC, the relation between magnetostriction and M2 deviates from proportionality and the magnetostriction is proportional to M4. At TC, the plot of ΔL/L vs M4 crossed the point of origin. This result is in accordance with Takahashi's spin fluctuation theory.",

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T1 - Forced magnetostriction of ferromagnetic Heusler alloy Ni2MnGa at the Curie temperature

AU - Sakon, T.

AU - Hayashi, Y.

AU - Fujimoto, N.

AU - Kanomata, T.

AU - Nojiri, H.

AU - Adachi, Y.

PY - 2018/6/7

Y1 - 2018/6/7

N2 - An investigation on the relationship between magnetostriction and magnetization by means of the self-consistent renormalization (SCR) theory of an itinerant ferromagnet was performed for Ni2MnGa alloy. The magnetization results at the Curie temperature TC suggest that the critical index δ of H - Mδ is 4.7-5.0, and this confirms Takahashi's spin fluctuation theory and the result of Nishihara et al. As a result, at TC, the relation between magnetostriction and M2 deviates from proportionality and the magnetostriction is proportional to M4. At TC, the plot of ΔL/L vs M4 crossed the point of origin. This result is in accordance with Takahashi's spin fluctuation theory.

AB - An investigation on the relationship between magnetostriction and magnetization by means of the self-consistent renormalization (SCR) theory of an itinerant ferromagnet was performed for Ni2MnGa alloy. The magnetization results at the Curie temperature TC suggest that the critical index δ of H - Mδ is 4.7-5.0, and this confirms Takahashi's spin fluctuation theory and the result of Nishihara et al. As a result, at TC, the relation between magnetostriction and M2 deviates from proportionality and the magnetostriction is proportional to M4. At TC, the plot of ΔL/L vs M4 crossed the point of origin. This result is in accordance with Takahashi's spin fluctuation theory.

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Forced magnetostriction of ferromagnetic Heusler alloy Ni₂MnGa at the Curie temperature

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