Magnetic properties and magnetocaloric effect in TmGa and HoGa single crystals

Tian Gao; Katsuhiko Nishimura; Takashi Matsumoto; Takahiro Namiki; Yosikazu Isikawa

doi:10.1016/j.ssc.2012.12.028

Magnetic properties and magnetocaloric effect in TmGa and HoGa single crystals

Tian Gao, Katsuhiko Nishimura^*, Takashi Matsumoto, Takahiro Namiki, Yosikazu Isikawa

^*Corresponding author for this work

Materials Design and Engineering

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

17 Scopus citations

Abstract

We studied the magnetic property, heat capacity, and magnetocaloric effect of TmGa and HoGa single crystals. The observed magnetizations at three principal crystallographic axes display clear magnetic anisotropy, indicating an easy magnetic direction at the a-axis for TmGa and c-axis for HoGa. The measured specific heat of TmGa revealed the Curie temperature of 15 K and spin-reorientation temperatures at about 12.5 and 3.0 K respectively. Both samples exhibit giant reversible anisotropic magnetocaloric effect based on a second-order phase transition. Along the easy axis, the maximum value of magnetic entropy change for a magnetic field change of 0-5 T reaches 26.1 J kg^-1 K^-1 at 15 K and 14.9 J kg^-1 K^-1 at 65 K for TmGa and HoGa, respectively. The corresponding relative cooling powers are achieved to be 468 and 924 J kg^-1. These values suggest the possibility of using these materials in magnetic refrigeration applications.

Original language	English
Pages (from-to)	1-4
Number of pages	4
Journal	Solid State Communications
Volume	158
DOIs	https://doi.org/10.1016/j.ssc.2012.12.028
State	Published - 2013/03

Keywords

A. HoGa
A. TmGa
C. Single Crystal
D. Magnetocaloric effect

ASJC Scopus subject areas

General Chemistry
Condensed Matter Physics
Materials Chemistry

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10.1016/j.ssc.2012.12.028

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title = "Magnetic properties and magnetocaloric effect in TmGa and HoGa single crystals",

abstract = "We studied the magnetic property, heat capacity, and magnetocaloric effect of TmGa and HoGa single crystals. The observed magnetizations at three principal crystallographic axes display clear magnetic anisotropy, indicating an easy magnetic direction at the a-axis for TmGa and c-axis for HoGa. The measured specific heat of TmGa revealed the Curie temperature of 15 K and spin-reorientation temperatures at about 12.5 and 3.0 K respectively. Both samples exhibit giant reversible anisotropic magnetocaloric effect based on a second-order phase transition. Along the easy axis, the maximum value of magnetic entropy change for a magnetic field change of 0-5 T reaches 26.1 J kg-1 K-1 at 15 K and 14.9 J kg-1 K-1 at 65 K for TmGa and HoGa, respectively. The corresponding relative cooling powers are achieved to be 468 and 924 J kg-1. These values suggest the possibility of using these materials in magnetic refrigeration applications.",

keywords = "A. HoGa, A. TmGa, C. Single Crystal, D. Magnetocaloric effect",

author = "Tian Gao and Katsuhiko Nishimura and Takashi Matsumoto and Takahiro Namiki and Yosikazu Isikawa",

year = "2013",

month = mar,

doi = "10.1016/j.ssc.2012.12.028",

language = "英語",

volume = "158",

pages = "1--4",

journal = "Solid State Communications",

issn = "0038-1098",

publisher = "Elsevier Ltd.",

}

TY - JOUR

T1 - Magnetic properties and magnetocaloric effect in TmGa and HoGa single crystals

AU - Gao, Tian

AU - Nishimura, Katsuhiko

AU - Matsumoto, Takashi

AU - Namiki, Takahiro

AU - Isikawa, Yosikazu

PY - 2013/3

Y1 - 2013/3

N2 - We studied the magnetic property, heat capacity, and magnetocaloric effect of TmGa and HoGa single crystals. The observed magnetizations at three principal crystallographic axes display clear magnetic anisotropy, indicating an easy magnetic direction at the a-axis for TmGa and c-axis for HoGa. The measured specific heat of TmGa revealed the Curie temperature of 15 K and spin-reorientation temperatures at about 12.5 and 3.0 K respectively. Both samples exhibit giant reversible anisotropic magnetocaloric effect based on a second-order phase transition. Along the easy axis, the maximum value of magnetic entropy change for a magnetic field change of 0-5 T reaches 26.1 J kg-1 K-1 at 15 K and 14.9 J kg-1 K-1 at 65 K for TmGa and HoGa, respectively. The corresponding relative cooling powers are achieved to be 468 and 924 J kg-1. These values suggest the possibility of using these materials in magnetic refrigeration applications.

AB - We studied the magnetic property, heat capacity, and magnetocaloric effect of TmGa and HoGa single crystals. The observed magnetizations at three principal crystallographic axes display clear magnetic anisotropy, indicating an easy magnetic direction at the a-axis for TmGa and c-axis for HoGa. The measured specific heat of TmGa revealed the Curie temperature of 15 K and spin-reorientation temperatures at about 12.5 and 3.0 K respectively. Both samples exhibit giant reversible anisotropic magnetocaloric effect based on a second-order phase transition. Along the easy axis, the maximum value of magnetic entropy change for a magnetic field change of 0-5 T reaches 26.1 J kg-1 K-1 at 15 K and 14.9 J kg-1 K-1 at 65 K for TmGa and HoGa, respectively. The corresponding relative cooling powers are achieved to be 468 and 924 J kg-1. These values suggest the possibility of using these materials in magnetic refrigeration applications.

KW - A. HoGa

KW - A. TmGa

KW - C. Single Crystal

KW - D. Magnetocaloric effect

UR - http://www.scopus.com/inward/record.url?scp=84875165040&partnerID=8YFLogxK

U2 - 10.1016/j.ssc.2012.12.028

DO - 10.1016/j.ssc.2012.12.028

M3 - 学術論文

AN - SCOPUS:84875165040

SN - 0038-1098

VL - 158

SP - 1

EP - 4

JO - Solid State Communications

JF - Solid State Communications

ER -

Magnetic properties and magnetocaloric effect in TmGa and HoGa single crystals

Abstract

Keywords

ASJC Scopus subject areas

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