Abstract
The phases in the compounds (Gd1−x Ce x )Co2 with x = 0, 0.1, 0.2, 0.3, 0.4, and 0.5 were investigated by X-ray diffraction, and the magnetocaloric effect for x = 0–0.4 was studied by magnetization measurements. The samples are almost single phase with a cubic MgCu2-type structure for x = 0–0.5. The magnetization decreases with an increase in Ce content. There is almost no magnetic transition for x = 0.5 at 100–350 K. The Curie temperature (T c) of the (Gd1−x Ce x )Co2 compounds with x from 0.1 to 0.4 are 350, 344, 340, and 338 K respectively. The maximum magnetic entropy change is 2.34 J·kg−1·K−1 when x = 0.3. The results of Arrott plots show that the magnetic phase transition is second-order magnetic phase transition in these compounds.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Brown G.V., Magnetic heat pumping near room temperature, J. Appl. Phys., 1976, 47: 3673.
Pecharsky V.K. and Gschneidner K.A.J., Tunable magnetic regenerator alloys with a giant magnetocaloric effect for magnetic refrigeration from 20 to 290 K, Appl. Phys. Lett., 1997, 70(24): 3299.
Pecharsky V.K. and Gschneidner K.A.J., Giant magnetocaloric effect in Gd5(Si2Ge2), Phys. Rev. Lett., 1997, 78(23):4494.
Pecharsky V.K. and Gschneidner K.A.J., Effect of alloying on the giant magnetocaloric effect of Gd5(Si2Ge2), J. Magn. Magn. Mater., 1997, 167(3): 179.
Buschow K.H.J., Handbook of Magnetic Materials, Elsevier, Amsterdam, 1999.
Gu Z.F., Zhou B., Li J.Q., Ao W.Q., Cheng G., and Zhao J.C., Magnetocaloric effect of GdCo2−x Alx compounds, Solid State Commun., 2007 141(10): 548.
Zhou K.W., Zhuang Y.H., Li J.Q., Deng J.Q., and Zhu Q.M., Magnetocaloric effects in (Gd1−x Tbx)Co2, Solid State Commun., 2006, 137(5): 275.
Murata K., Fukamich K., Fujinaga Y., Syono Y., and Goto T., Magnetoelastic properties of Laves phase compounds (Gd1−x Yx)Co2, J. Magn. Magn. Mater., 1995, 140–142(2):833.
Liu X.B and Altounian Z., Magnetocaloric effect in (Er1−x Gdx)Co2 pseudobinary compounds, J. Magn. Magn. Mater., 2005, 292(4): 83.
Wang D.H., Liu H.D., and Tang S.L., Magnetic properties and magnetocaloric effects in (GdxDy1−x )Co2 compounds, Phys. Lett. A, 2002, 297(3–4): 247.
Chen X., Zhuang Y.H., Yan J.L., and Zhou K.W., Magneto-caloric effect of (Gd1−x Ndx)Co2 alloys in low magnetic field, Rare Met., 2008, 27(4): 350.
Seixas T.M. and Machado da Silva J.M., Magnetic behavior of CeCo2, Phys. B, 1999, 269(3–4): 362.
Ross J.W. and Crangle J., Magnetization of cubic Laves phase compounds of rare earths with cobalt, Phys. Rev. A, 1964, 133(2): 509.
Ohta H., Sumikawa M., Kita K., Motokawa M., and Seixas T., Submillimeter wave ESR and magnetization measurements of CexGd1−x Co2, Phys. B, 1996, 216(3–4): 341.
Hashimoto T., Numasawa T., Shino M., and Okada T., Magnetic refrigeration in the temperature range from 10 K to room temperature: the ferromagnetic refrigerants, Cryogenics, 1981, 21(11): 647.
Foldeaki M., Chahine R., and Bose T.K., A powerful tool in magnetic refrigerator design, J. Appl. Phys., 1995, 77(7):3528.
Villars P., Pearson’s Handbook of Crystallographic Data, ASM International, Materials Park, OH, 1997.
Smith T.F. and Harris I.R., Superconductivity of CeCo2, J. Phys. Chem. Solids, 1967, 28(9): 1846.
Aoki Y., Nishigaki T., Sugawara H., and Sato H., Anisotropic superconducting gap in CeCo2-Specific heat studies, Phys. B, 1997, 237(238): 302.
Fujieda S., Fujita A., and Fukamichi K., Large magnetocaloric effects in NaZn13-type La(FexSi1−x )13 compounds and their hydrides composed of icosahedral clusters, Sci. Technol. Adv. Mater., 2003, 4(4): 339.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Chen, X., Zhuang, Y., Fang, F. et al. Magnetocaloric effect of (Gd1−x Ce x )Co2 compounds in low magnetic fields. Rare Metals 28, 487–490 (2009). https://doi.org/10.1007/s12598-009-0094-3
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12598-009-0094-3