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

2 Citations (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

Access to Document

10.1016/j.physb.2015.02.012

Cite this

@article{2ed593e2be064edb8ffa4b0fc3d5ddd9,

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.}",

note = "Funding Information: The authors would like to express sincere thanks to Prof. T. Shishido and Mr. K. Obara of Institute for Materials Research, Tohoku University for their help on the sample preparation. This study was partly supported by a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (JSPS) . Publisher Copyright: {\textcopyright} 2015 Elsevier B.V. All rights reserved.",

year = "2015",

month = may,

day = "1",

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

language = "English",

volume = "464",

pages = "83--87",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

publisher = "Elsevier",

}

TY - JOUR

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.

N1 - Funding Information: The authors would like to express sincere thanks to Prof. T. Shishido and Mr. K. Obara of Institute for Materials Research, Tohoku University for their help on the sample preparation. This study was partly supported by a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (JSPS) . Publisher Copyright: © 2015 Elsevier B.V. All rights reserved.

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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