TY - JOUR
T1 - Ferromagnetic cluster glass behavior and large magnetocaloric effect in Ho2PtSi3
AU - Li, D. X.
AU - Homma, Y.
AU - Nakamura, A.
AU - Shimizu, Y.
AU - Honda, F.
AU - Yamamura, T.
AU - Aoki, D.
N1 - Funding Information:
A part of the experimental work was performed in the Laboratory of Low Temperature Materials Science, IMR, Tohoku University. The authors gratefully thank Prof. T. Nojima, Dr. S. Nakamura and other members of this laboratory for their kindly assistance. This work was supported by JSPS KAKENHI Grant Number 26400347 .
Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2017/12
Y1 - 2017/12
N2 - Magnetic properties and magnetocaloric effect of Ho2PtSi3, a new ternary intermetallic compound with the orthorhombic Ba2LiSi3-type structure, are studied by dc magnetization, ac susceptibility, magnetic relaxation, specific heat, and magnetic memory effect measurements. The experimental results indicate that this system undergoes a magnetic phase transition from a paramagnetic state to a ferromagnetic cluster state at a temperature TC ~ 6.5 K followed by a cluster glass transition at Tf ~ 5.8 K. The typical cluster glass features observed below Tf for Ho2PtSi3 include (1) broad peak in specific heat curve, (2) frequency dependent cusp in ac susceptibility curve, (3) evident irreversible magnetism, (4) long-time magnetic relaxation behavior, and (5) zero-field-cooling magnetic memory effect. On the other hand, the large values of magnetic entropy change, relative cooling power and adiabatic temperature change are estimated near TC under a field change. These results suggest that Ho2PtSi3 can be classified as a huge ferromagnetic cluster glass system with large magnetocaloric effect.
AB - Magnetic properties and magnetocaloric effect of Ho2PtSi3, a new ternary intermetallic compound with the orthorhombic Ba2LiSi3-type structure, are studied by dc magnetization, ac susceptibility, magnetic relaxation, specific heat, and magnetic memory effect measurements. The experimental results indicate that this system undergoes a magnetic phase transition from a paramagnetic state to a ferromagnetic cluster state at a temperature TC ~ 6.5 K followed by a cluster glass transition at Tf ~ 5.8 K. The typical cluster glass features observed below Tf for Ho2PtSi3 include (1) broad peak in specific heat curve, (2) frequency dependent cusp in ac susceptibility curve, (3) evident irreversible magnetism, (4) long-time magnetic relaxation behavior, and (5) zero-field-cooling magnetic memory effect. On the other hand, the large values of magnetic entropy change, relative cooling power and adiabatic temperature change are estimated near TC under a field change. These results suggest that Ho2PtSi3 can be classified as a huge ferromagnetic cluster glass system with large magnetocaloric effect.
KW - A. HoPtSi
KW - D. Cluster glass
KW - D. Magnetocaloric effect
KW - E. Magnetization and specific heat
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U2 - 10.1016/j.ssc.2017.09.010
DO - 10.1016/j.ssc.2017.09.010
M3 - Article
AN - SCOPUS:85029418000
SN - 0038-1098
VL - 268
SP - 1
EP - 6
JO - Solid State Communications
JF - Solid State Communications
ER -