Pressure effects on magnetic and magnetocaloric properties of GdCo 2B 2

Lingwei Li; Guanghui Hu; Izuru Umehara; Dexuan Huo; Takahiro Namiki; Katsuhiko Nishimura

doi:10.1143/JPSJ.81.073701

Pressure effects on magnetic and magnetocaloric properties of GdCo ₂B ₂

Lingwei Li^*, Guanghui Hu, Izuru Umehara, Dexuan Huo, Takahiro Namiki, Katsuhiko Nishimura

^*Corresponding author for this work

Materials Design and Engineering

Research output: Contribution to journal › Review article › peer-review

16 Scopus citations

Abstract

The magnetic and magnetocaloric properties of GdCo ₂B ₂ have been studied under hydrostatic pressures up to 1.27 GPa. The compound undergoes a paramagnetic to ferromagnetic transition at 22.2K and a ferromagnetic to antiferromagnetic transition at 13K with decreasing temperature. The effects of hydrostatic pressure are as follows: it is raises TC and lowers TN. The antiferromagnetic (AFM) phase is completely suppressed under 1.27 GPa, and thus the order of magnetic phase transition changes from first order to second order gradually with increasing pressure. With a field change of 5 T, the values of maximum magnetic entropy change are evaluated to be 17.1, 16.85, and 16.4 J kg ^-1 K ^-1 for P = 0, 0.73, and 1.27 GPa, respectively. The hydrostatic pressure effects on magnetic transition and MCE are discussed.

Original language	English
Article number	073701
Journal	Journal of the Physical Society of Japan
Volume	81
Issue number	7
DOIs	https://doi.org/10.1143/JPSJ.81.073701
State	Published - 2012/07

Keywords

GdCo B compound
High pressure effect
Magnetic phase transition
Magnetocaloric effect

ASJC Scopus subject areas

General Physics and Astronomy

Access to Document

10.1143/JPSJ.81.073701

Cite this

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title = "Pressure effects on magnetic and magnetocaloric properties of GdCo 2B 2 ",

abstract = "The magnetic and magnetocaloric properties of GdCo 2B 2 have been studied under hydrostatic pressures up to 1.27 GPa. The compound undergoes a paramagnetic to ferromagnetic transition at 22.2K and a ferromagnetic to antiferromagnetic transition at 13K with decreasing temperature. The effects of hydrostatic pressure are as follows: it is raises TC and lowers TN. The antiferromagnetic (AFM) phase is completely suppressed under 1.27 GPa, and thus the order of magnetic phase transition changes from first order to second order gradually with increasing pressure. With a field change of 5 T, the values of maximum magnetic entropy change are evaluated to be 17.1, 16.85, and 16.4 J kg -1 K -1 for P = 0, 0.73, and 1.27 GPa, respectively. The hydrostatic pressure effects on magnetic transition and MCE are discussed.",

keywords = "GdCo B compound, High pressure effect, Magnetic phase transition, Magnetocaloric effect",

author = "Lingwei Li and Guanghui Hu and Izuru Umehara and Dexuan Huo and Takahiro Namiki and Katsuhiko Nishimura",

year = "2012",

month = jul,

doi = "10.1143/JPSJ.81.073701",

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journal = "Journal of the Physical Society of Japan",

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TY - JOUR

T1 - Pressure effects on magnetic and magnetocaloric properties of GdCo 2B 2

AU - Li, Lingwei

AU - Hu, Guanghui

AU - Umehara, Izuru

AU - Huo, Dexuan

AU - Namiki, Takahiro

AU - Nishimura, Katsuhiko

PY - 2012/7

Y1 - 2012/7

N2 - The magnetic and magnetocaloric properties of GdCo 2B 2 have been studied under hydrostatic pressures up to 1.27 GPa. The compound undergoes a paramagnetic to ferromagnetic transition at 22.2K and a ferromagnetic to antiferromagnetic transition at 13K with decreasing temperature. The effects of hydrostatic pressure are as follows: it is raises TC and lowers TN. The antiferromagnetic (AFM) phase is completely suppressed under 1.27 GPa, and thus the order of magnetic phase transition changes from first order to second order gradually with increasing pressure. With a field change of 5 T, the values of maximum magnetic entropy change are evaluated to be 17.1, 16.85, and 16.4 J kg -1 K -1 for P = 0, 0.73, and 1.27 GPa, respectively. The hydrostatic pressure effects on magnetic transition and MCE are discussed.

AB - The magnetic and magnetocaloric properties of GdCo 2B 2 have been studied under hydrostatic pressures up to 1.27 GPa. The compound undergoes a paramagnetic to ferromagnetic transition at 22.2K and a ferromagnetic to antiferromagnetic transition at 13K with decreasing temperature. The effects of hydrostatic pressure are as follows: it is raises TC and lowers TN. The antiferromagnetic (AFM) phase is completely suppressed under 1.27 GPa, and thus the order of magnetic phase transition changes from first order to second order gradually with increasing pressure. With a field change of 5 T, the values of maximum magnetic entropy change are evaluated to be 17.1, 16.85, and 16.4 J kg -1 K -1 for P = 0, 0.73, and 1.27 GPa, respectively. The hydrostatic pressure effects on magnetic transition and MCE are discussed.

KW - GdCo B compound

KW - High pressure effect

KW - Magnetic phase transition

KW - Magnetocaloric effect

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