TY - JOUR
T1 - Effect of Fe substitution on magnetic and magnetocaloric effect in Gd(Co1-xFex)2B2 compounds
AU - Li, Lingwei
AU - Nishimura, Yasuhiro
AU - Huo, Dexuan
AU - Qian, Zhenghong
AU - Nishimura, Katsuhiko
N1 - Funding Information:
This work was partially supported by the National Natural Science Foundation of China (No. 11004044 and No.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 - 2011/10/15
Y1 - 2011/10/15
N2 - Polycrystalline samples of Gd(Co1-xFe x)2B2 (x 0, 0.1, 0.2, and 0.4) compounds have been prepared and their magnetic properties and magnetocaloric effect (MCE) have been studied by the magnetization and heat capacity measurements. As the Fe content x increases up to 0.4, the magnetic ordering temperature TM increases gradually from 19 to 32 K, the maximum values of magnetic entropy change -ΔSMmax decreases gradually from 17.1 to 12.1 J/kg K without obvious hysteresis around its own ΔTM for a field change of 5 T, and the corresponding adiabatic temperature change T admax also decreases gradually from 15.4 to 8 K. The reduction in the MCE of Gd(Co1-xFex) 2B2 system could be explained by the fact that the increase in the Fe content transforms the magnetic transition type from a first order type to a second order type. The values of relative cooling power (RCP) are 462, 434, 499, and 415 J/kg for x 0, 0.1, 0.2, and 0.4 in Gd(Co 1-xFex)2B2, respectively. The magnetic transition and Fe substitution effect on MCE as well as its potential application in Gd(Co1-xFex) 2B2 system were discussed.
AB - Polycrystalline samples of Gd(Co1-xFe x)2B2 (x 0, 0.1, 0.2, and 0.4) compounds have been prepared and their magnetic properties and magnetocaloric effect (MCE) have been studied by the magnetization and heat capacity measurements. As the Fe content x increases up to 0.4, the magnetic ordering temperature TM increases gradually from 19 to 32 K, the maximum values of magnetic entropy change -ΔSMmax decreases gradually from 17.1 to 12.1 J/kg K without obvious hysteresis around its own ΔTM for a field change of 5 T, and the corresponding adiabatic temperature change T admax also decreases gradually from 15.4 to 8 K. The reduction in the MCE of Gd(Co1-xFex) 2B2 system could be explained by the fact that the increase in the Fe content transforms the magnetic transition type from a first order type to a second order type. The values of relative cooling power (RCP) are 462, 434, 499, and 415 J/kg for x 0, 0.1, 0.2, and 0.4 in Gd(Co 1-xFex)2B2, respectively. The magnetic transition and Fe substitution effect on MCE as well as its potential application in Gd(Co1-xFex) 2B2 system were discussed.
UR - http://www.scopus.com/inward/record.url?scp=80655141611&partnerID=8YFLogxK
U2 - 10.1063/1.3654013
DO - 10.1063/1.3654013
M3 - 学術論文
AN - SCOPUS:80655141611
SN - 0021-8979
VL - 110
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 8
M1 - 083915
ER -