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Title: Sample dependence of giant magnetocaloric effect in a cluster-glass system Ho{sub 5}Pd{sub 2}

Abstract

In order to investigate the effect of vacancy on the magnetocaloric effect in Ho{sub 5}Pd{sub 2}, we have carried out X-ray diffraction, magnetization, and specific heat measurements in the rare-earth intermetallic compound Ho{sub 5+x}Pd{sub 2}(−0.4 ≤ x ≤ 0.4). The maximum magnetic entropy change −ΔS{sub m}{sup max}, the maximum adiabatic temperature change ΔT{sub ad}{sup max}, and the relative cooling power of Ho{sub 5+x}Pd{sub 2} take large values at x = 0−0.4 for the field change of 5 T. The paramagnetic Curie temperature θ{sub p} increases with an increase of x. This fact suggests that the enhancement of ferromagnetic coupling among the correlated spins leads to the increase of magnetocaloric effect.

Authors:
;  [1]; ; ; ; ;  [2];  [2];  [3];  [4]
  1. Graduate School of Advanced Science and Technology, Tokyo Denki University, 5 Senju Asahi-cho, Adachi, Tokyo 120–8551 (Japan)
  2. National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305–0047 (Japan)
  3. (Japan)
  4. School of Engineering, Tokyo Denki University, 5 Senju Asahi-cho, Adachi, Tokyo 120-8551 (Japan)
Publication Date:
OSTI Identifier:
22410050
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CONCENTRATION RATIO; COUPLING; CURIE POINT; ENTROPY; HOLMIUM; INTERMETALLIC COMPOUNDS; MAGNETIC PROPERTIES; MAGNETIZATION; PALLADIUM; PARAMAGNETISM; SPECIFIC HEAT; SPIN; VACANCIES; X-RAY DIFFRACTION; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Toyoizumi, Saori, E-mail: 14udb03@ms.dendai.ac.jp, Tamaki, Akira, Kitazawa, Hideaki, Mamiya, Hiroaki, Terada, Noriki, Tamura, Ryo, Dönni, Andreas, Kawamura, Yukihiko, Research Center for Neutron Science and Technology, Comprehensive Research Organization for Science and Society, 162-1 Shirane Shirakata, Tokai-mura, Naka-gun, Ibaraki 319–1106, and Morita, Kengo. Sample dependence of giant magnetocaloric effect in a cluster-glass system Ho{sub 5}Pd{sub 2}. United States: N. p., 2015. Web. doi:10.1063/1.4906296.
Toyoizumi, Saori, E-mail: 14udb03@ms.dendai.ac.jp, Tamaki, Akira, Kitazawa, Hideaki, Mamiya, Hiroaki, Terada, Noriki, Tamura, Ryo, Dönni, Andreas, Kawamura, Yukihiko, Research Center for Neutron Science and Technology, Comprehensive Research Organization for Science and Society, 162-1 Shirane Shirakata, Tokai-mura, Naka-gun, Ibaraki 319–1106, & Morita, Kengo. Sample dependence of giant magnetocaloric effect in a cluster-glass system Ho{sub 5}Pd{sub 2}. United States. doi:10.1063/1.4906296.
Toyoizumi, Saori, E-mail: 14udb03@ms.dendai.ac.jp, Tamaki, Akira, Kitazawa, Hideaki, Mamiya, Hiroaki, Terada, Noriki, Tamura, Ryo, Dönni, Andreas, Kawamura, Yukihiko, Research Center for Neutron Science and Technology, Comprehensive Research Organization for Science and Society, 162-1 Shirane Shirakata, Tokai-mura, Naka-gun, Ibaraki 319–1106, and Morita, Kengo. Thu . "Sample dependence of giant magnetocaloric effect in a cluster-glass system Ho{sub 5}Pd{sub 2}". United States. doi:10.1063/1.4906296.
@article{osti_22410050,
title = {Sample dependence of giant magnetocaloric effect in a cluster-glass system Ho{sub 5}Pd{sub 2}},
author = {Toyoizumi, Saori, E-mail: 14udb03@ms.dendai.ac.jp and Tamaki, Akira and Kitazawa, Hideaki and Mamiya, Hiroaki and Terada, Noriki and Tamura, Ryo and Dönni, Andreas and Kawamura, Yukihiko and Research Center for Neutron Science and Technology, Comprehensive Research Organization for Science and Society, 162-1 Shirane Shirakata, Tokai-mura, Naka-gun, Ibaraki 319–1106 and Morita, Kengo},
abstractNote = {In order to investigate the effect of vacancy on the magnetocaloric effect in Ho{sub 5}Pd{sub 2}, we have carried out X-ray diffraction, magnetization, and specific heat measurements in the rare-earth intermetallic compound Ho{sub 5+x}Pd{sub 2}(−0.4 ≤ x ≤ 0.4). The maximum magnetic entropy change −ΔS{sub m}{sup max}, the maximum adiabatic temperature change ΔT{sub ad}{sup max}, and the relative cooling power of Ho{sub 5+x}Pd{sub 2} take large values at x = 0−0.4 for the field change of 5 T. The paramagnetic Curie temperature θ{sub p} increases with an increase of x. This fact suggests that the enhancement of ferromagnetic coupling among the correlated spins leads to the increase of magnetocaloric effect.},
doi = {10.1063/1.4906296},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 17,
volume = 117,
place = {United States},
year = {2015},
month = {5}
}