DOI QR코드

DOI QR Code

The Annealing Effect on Magnetocaloric Properties of Fe91-xYxZr9 Alloys

  • Kim, K.S. (School of Electrical & Computer Engineering, Chungbuk National University) ;
  • Min, S.G. (Department of Physics, Chungbuk National University) ;
  • Zidanic, J. (Department of Physics, Chungbuk National University) ;
  • Yu, S.C. (Department of Physics, Chungbuk National University)
  • 발행 : 2007.12.31

초록

We have carried out the study of magnetocaloric effect for as-quenched and annealed $Fe_{91-x}Y_xZr_9$ alloys. Samples were prepared by arc melting the high-purity elemental constituents under argon gas atmosphere and by single roller melt spinning. These alloys were annealed one hour at 773 K in vacuum chamber. The magnetization behaviours of the samples were measured by vibrating sample magnetometer. The Curie temperature increases with increasing Y concentration (x=0 to 8). Temperature dependence of the entropy variation ${\Delta}S_M$ was found to appear in the vicinity of the Curie temperature. The results show that annealed $Fe_{86}Y_5Zr_9$ and $Fe_{83}Y_8Zr_9$ alloys a bigger magnetocaloric effect than that those in as-quenched alloys. The value is 1.23 J/kg K for annealed $Fe_{86}Y_5Zr_9$ alloy and 0.89 J/kg K for as-quenched alloy, respectively. In addition, the values of ${\Delta}S_M$ for $Fe_{83}Y_8Zr_9$ alloy is 0.72 J/Kg K for as-quenched and 1.09 J/Kg K for annealed alloy, respectively.

키워드

참고문헌

  1. E. Warburg, Ann. Phys. 13, 141 (1881)
  2. P. Debye, Ann. Phys. 81, 1154 (1926)
  3. W. F. Giauque, J. Amer. Chem. Soc. 49, 1864 (1927)
  4. K. A. Gschneidner Jr., and V. K. Pecharsky, J. Appl. Phys. 85, 5365 (1999)
  5. V. K. Pecharsky, and K. A. Gschneidner Jr., J. Appl. Phys. 86(1), 565 (1999) https://doi.org/10.1063/1.370838
  6. M. Foldeaki, R. Chahine, and T. K. Bose, J. Appl. Phys. 77(7), 3528 (1995)
  7. V. K. Pecharsky, and K. A. Gschneidner Jr., J. Mag. & Mag. Mat. 200, 44 (1999)
  8. Y. M. Moon, S. G. Min, K. S. Kim, S. C. Yu, Y. C. Kim, and K. Y. Kim, J. Mag. 10(4), 142 (2005) https://doi.org/10.4283/JMAG.2005.10.1.005
  9. Y. M. Moon, K. S. Kim, S. C. Yu, and V. Srinivas, J. Magnetics 9(4), 113 (2004)
  10. L. Drouch, K. S. Kim, and K. V. Rao, J. Appl. Phys. 81(8), 4640 (1997) https://doi.org/10.1063/1.364190
  11. K. S. Kim et al. J. Magn. Magn. Mater. 304, e462 (2006) https://doi.org/10.1016/j.jmmm.2006.02.013
  12. S. K. Banerjee, Phys. Lett. 12, 16 (1964) https://doi.org/10.1103/PhysRevLett.12.16