The effect of pressure on the magnetic and structural transition temperatures of the shape memory alloys Ni50+x(Mn0.5Fe0.5)25Ga25-x

Y. Adachi; M. Kato; T. Kanomata; D. Kikuchi; X. Xu; R. Y. Umetsu; R. Kainuma; K. R.A. Ziebeck

doi:10.1016/j.physb.2015.02.012

The effect of pressure on the magnetic and structural transition temperatures of the shape memory alloys Ni_50+x(Mn_0.5Fe_0.5)₂₅Ga_25-x

Y. Adachi, M. Kato, T. Kanomata, D. Kikuchi, X. Xu, R. Y. Umetsu, R. Kainuma, K. R.A. Ziebeck

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

1 Citation (Scopus)

Abstract

Abstract The effect of pressure on the Curie temperature T_C and the martensitic transition temperature T_M of the ferromagnetic shape memory alloys Ni_50+x(Mn_0.5Fe_0.5)₂₅Ga_25-x has been investigated by measuring the temperature dependence of the initial permeability at various pressures up to ~10 kbar. The pressure derivatives of T_C and T_M, dT_C/dp and dT_M/dp, of Ni₅₀(Mn_0.5Fe_0.5)₂₅Ga₂₅ (x=0) are found to be 0.23 K/kbar and 0.77 K/kbar, respectively. The values of dT_C/dp and dT_M/dp of Ni_50+x(Mn_0.5Fe_0.5)₂₅Ga_25-x alloys decrease with increasing x. Moreover the sign of dT_C/dp changes from positive to negative with increasing x. The pressure dependence of T_C for Ni_50+x(Mn_0.5Fe_0.5)₂₅Ga_25-x alloys is discussed qualitatively based on the dependence of the exchange interactions on interatomic distance.

Original language	English
Article number	308895
Pages (from-to)	83-87
Number of pages	5
Journal	Physica B: Condensed Matter
Volume	464
DOIs	https://doi.org/10.1016/j.physb.2015.02.012
Publication status	Published - 2015 May 1

Keywords

Curie temperature
Martensitic transition temperature
Pressure effect
Shape memory alloy

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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The effect of pressure on the magnetic and structural transition temperatures of the shape memory alloys Ni_50+x(Mn_0.5Fe_0.5)₂₅Ga_25-x. / Adachi, Y.; Kato, M.; Kanomata, T.; Kikuchi, D.; Xu, X.; Umetsu, R. Y.; Kainuma, R.; Ziebeck, K. R.A.

In: Physica B: Condensed Matter, Vol. 464, 308895, 01.05.2015, p. 83-87.

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

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title = "The effect of pressure on the magnetic and structural transition temperatures of the shape memory alloys Ni50+x(Mn0.5Fe0.5)25Ga25-x",

abstract = "Abstract The effect of pressure on the Curie temperature TC and the martensitic transition temperature TM of the ferromagnetic shape memory alloys Ni50+x(Mn0.5Fe0.5)25Ga25-x has been investigated by measuring the temperature dependence of the initial permeability at various pressures up to ~10 kbar. The pressure derivatives of TC and TM, dTC/dp and dTM/dp, of Ni50(Mn0.5Fe0.5)25Ga25 (x=0) are found to be 0.23 K/kbar and 0.77 K/kbar, respectively. The values of dTC/dp and dTM/dp of Ni50+x(Mn0.5Fe0.5)25Ga25-x alloys decrease with increasing x. Moreover the sign of dTC/dp changes from positive to negative with increasing x. The pressure dependence of TC for Ni50+x(Mn0.5Fe0.5)25Ga25-x alloys is discussed qualitatively based on the dependence of the exchange interactions on interatomic distance.",

keywords = "Curie temperature, Martensitic transition temperature, Pressure effect, Shape memory alloy",

author = "Y. Adachi and M. Kato and T. Kanomata and D. Kikuchi and X. Xu and Umetsu, {R. Y.} and R. Kainuma and Ziebeck, {K. R.A.}",

year = "2015",

month = may,

day = "1",

doi = "10.1016/j.physb.2015.02.012",

language = "English",

volume = "464",

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T1 - The effect of pressure on the magnetic and structural transition temperatures of the shape memory alloys Ni50+x(Mn0.5Fe0.5)25Ga25-x

AU - Adachi, Y.

AU - Kato, M.

AU - Kanomata, T.

AU - Kikuchi, D.

AU - Xu, X.

AU - Umetsu, R. Y.

AU - Kainuma, R.

AU - Ziebeck, K. R.A.

PY - 2015/5/1

Y1 - 2015/5/1

N2 - Abstract The effect of pressure on the Curie temperature TC and the martensitic transition temperature TM of the ferromagnetic shape memory alloys Ni50+x(Mn0.5Fe0.5)25Ga25-x has been investigated by measuring the temperature dependence of the initial permeability at various pressures up to ~10 kbar. The pressure derivatives of TC and TM, dTC/dp and dTM/dp, of Ni50(Mn0.5Fe0.5)25Ga25 (x=0) are found to be 0.23 K/kbar and 0.77 K/kbar, respectively. The values of dTC/dp and dTM/dp of Ni50+x(Mn0.5Fe0.5)25Ga25-x alloys decrease with increasing x. Moreover the sign of dTC/dp changes from positive to negative with increasing x. The pressure dependence of TC for Ni50+x(Mn0.5Fe0.5)25Ga25-x alloys is discussed qualitatively based on the dependence of the exchange interactions on interatomic distance.

AB - Abstract The effect of pressure on the Curie temperature TC and the martensitic transition temperature TM of the ferromagnetic shape memory alloys Ni50+x(Mn0.5Fe0.5)25Ga25-x has been investigated by measuring the temperature dependence of the initial permeability at various pressures up to ~10 kbar. The pressure derivatives of TC and TM, dTC/dp and dTM/dp, of Ni50(Mn0.5Fe0.5)25Ga25 (x=0) are found to be 0.23 K/kbar and 0.77 K/kbar, respectively. The values of dTC/dp and dTM/dp of Ni50+x(Mn0.5Fe0.5)25Ga25-x alloys decrease with increasing x. Moreover the sign of dTC/dp changes from positive to negative with increasing x. The pressure dependence of TC for Ni50+x(Mn0.5Fe0.5)25Ga25-x alloys is discussed qualitatively based on the dependence of the exchange interactions on interatomic distance.

KW - Curie temperature

KW - Martensitic transition temperature

KW - Pressure effect

KW - Shape memory alloy

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