Browse > Article
http://dx.doi.org/10.4283/JMAG.2005.10.4.142

The Large Magnetocaloric Effect in Amorphous Fe80-xMnxZr10 (x = 4,6,8,10) Alloys  

Moon, Y.M. (Department of Physics, Chungbuk National University)
Min, S.G (Department of Physics, Chungbuk National University)
Kim, K.S. (Department of Physics, Chungbuk National University)
Yu, S.C. (Department of Physics, Chungbuk National University)
Kim, Y.C. (Division of Materials Science and Engineering, Korea Institute of Science and Technology)
Kim, K.Y. (Division of Materials Science and Engineering, Korea Institute of Science and Technology)
Publication Information
Journal of Magnetics / v.10, no.4, 2005 , pp. 142-144 More about this Journal
Abstract
The Magnetization behaviour has been measured for amorphous $Fe_{80-x}Mn_xZr_{10}$ (x = 4,6,8,10) alloys. The Curie temperature decreased from 236 K to 195 K with increasing Mn concentration (x = 4 to x = 10). The magnetization measurements were conducted at temperatures above the Curie temperature in the paramagnetic region. In all samples, the magnetic properties showed superparamagnetic behavior above $T_c$ where the mean magnetic moment of the superparamagnetic spin clusters decreased with increasing temperature. A large magnetic entropy change, ${\Delta}S_M$, which is calculated from H vs M curves associated with the ferromagnetic-paramagnetic transitions in amorphous, has been observed. With Mn concentration increasing, ${\Delta}S_M$ decreases 1.04, 0.95, 0.87 J/kg K at 222, 210, 195 K (the Curie temperature), respectively.
Keywords
magnetocaloric effect; isothermal magnetization; magnetic refrigeration;
Citations & Related Records
연도 인용수 순위
  • Reference
1 O. Tegus, E. Bruck, L. Zhang, Dagula, K. H. J. Buschow, and F. R. Boer, Physica B 319, 174 (2002)
2 V. K. Pecharsky, and K. A. Gschneidner Jr., Phys. Rev. Lett. 78, 4494 (1997)
3 V. K. Pecharsky, and K. A. Gschneidner Jr., Appl. Phys. Lett. 70, 3299 (1997)
4 M. Foldeaki, A. Giguere, B. R. Gopal, R. Chahine, T. K. Bose, X. Y. Liu, and J. A. Barclay, J. Magn. Magn. Mater. 174,295 (1997)
5 H. Terashita, J. J. Garbe, and J. J. Neumeier, Phys. Rev. B 70, 094403 (2004)
6 A. Fujita, S. Fujieda, Y. Hasegawa, and K. Fukamichi, Phys. Rev. B 67, 104416 (2003)
7 F. X. Hu, B. G. Shen, J. R. Sun, G. J. Wang, and Z. H. Cheng, Appl. Phys. Lett. 80(5), 826 (2002)
8 B. Teng, M. Tu, Y. Chen, and J. Tang, J. Phys.: Condens. Matter 14, 6501 (2002)
9 A. Peruman, V. Srinivas, K. S. Kim, S. C. Yu, V. V. Rao, and R. A. Dunlap, Phys. Rev. B 65, 064428 (2002)
10 S. Chaudhary, V. S. Kumar, S. B. Roy, P. Chaddah, S. R. Krishnakumar, V. G. sathe, A. Kumar, and D. D. Sarman, J. Magn. Magn. Mater. 202, 47 (1999)