TY - JOUR
T1 - Giant magnetocaloric effect in antiferromagnetic borocarbide superconductor RNi2B2C (R Dy, Ho, and Er) compounds
AU - Li, Lingwei
AU - Nishimura, Katsuhiko
AU - Kadonaga, Michiaki
AU - Qian, Zhenghong
AU - Huo, Dexuan
N1 - Funding Information:
This work was partially supported by the National Natural Science Foundation of China (Nos. 11004044 and 50871036), Japan Society for the Promotion of Science (JSPS) Postdoctoral Fellowships for Foreign Researchers (No. P10060), and Innovation Research Team for Spintronic Materials and Devices of Zhejiang Province.
PY - 2011/8/15
Y1 - 2011/8/15
N2 - The magnetocaloric effect (MCE) in antiferromagnetic borocarbide superconductor RNi2B2C (R = Dy, Ho, and Er) compounds have been investigated by measuring the temperature and field dependences of heat capacity. An inverse MCE was observed, which is attributed to the nature of the antiferromagnetic state under low magnetic field and at low temperatures for the present RNi2B2C compounds. A normal giant/large MCE was observed under higher magnetic field change, which is related to a field-induced first-order metamagnetic transition from antiferromagnetic to ferromagnetic state. For a field change of 5 T, the maximum values of magnetic entropy change (- δSMmax) reach 17.6, 17.7, and 9.8 J kg -1 K-1 for R = Dy, Ho, and Er, respectively. The corresponding values of maximum adiabatic temperature changes (δT admax) are 9.7, 11, and 4.6 K. The present results indicated the antiferromagnetic borocarbide superconductor RNi2B 2C compounds could be promising candidates for low temperature magnetic refrigeration.
AB - The magnetocaloric effect (MCE) in antiferromagnetic borocarbide superconductor RNi2B2C (R = Dy, Ho, and Er) compounds have been investigated by measuring the temperature and field dependences of heat capacity. An inverse MCE was observed, which is attributed to the nature of the antiferromagnetic state under low magnetic field and at low temperatures for the present RNi2B2C compounds. A normal giant/large MCE was observed under higher magnetic field change, which is related to a field-induced first-order metamagnetic transition from antiferromagnetic to ferromagnetic state. For a field change of 5 T, the maximum values of magnetic entropy change (- δSMmax) reach 17.6, 17.7, and 9.8 J kg -1 K-1 for R = Dy, Ho, and Er, respectively. The corresponding values of maximum adiabatic temperature changes (δT admax) are 9.7, 11, and 4.6 K. The present results indicated the antiferromagnetic borocarbide superconductor RNi2B 2C compounds could be promising candidates for low temperature magnetic refrigeration.
UR - http://www.scopus.com/inward/record.url?scp=80052409502&partnerID=8YFLogxK
U2 - 10.1063/1.3625250
DO - 10.1063/1.3625250
M3 - 学術論文
AN - SCOPUS:80052409502
SN - 0021-8979
VL - 110
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 4
M1 - 043912
ER -