Artículos de revistas
Effect Of Tm Substitution On The Magnetic And Magnetocaloric Properties In The Intermetallic Compounds (tb1-xtmx)co2
Registro en:
Journal Of Physics D: Applied Physics. , v. 40, n. 6, p. 1620 - 1625, 2007.
223727
10.1088/0022-3727/40/6/005
2-s2.0-33947637192
Autor
Singh N.K.
Kumar P.
Suresh K.G.
Coelho A.A.
Gama S.
Nigam A.K.
Institución
Resumen
The magnetic and magnetocaloric properties of the intermetallic compounds Tb1-xTmxCo2 (with x ≤ 0, 0.2 and 0.5) have been studied. It is found that partial replacement of Tb by Tm in TbCo 2 leads to a reduction in the ordering temperature, which is attributed to the decrease in the exchange strength due to the lower spin value of Tm3+ as compared with that of Tb3+. The analysis of the zero-field heat capacity data at low temperature shows that the coefficient of electronic heat capacity increases with increase in Tm content and is attributed to the presence of local spin fluctuations. The variation of the magnetocaloric effect (MCE) has been explained on the basis of the magnetic properties. Temperature dependence of the MCE shows that this system may be useful for magnetic refrigeration applications in a sub-room temperature regime. © 2007 IOP Publishing Ltd. 40 6 1620 1625 Tishin, A.M., Spichkin, Y.I., (2003) The Magnetocaloric Effect and Its Applications Gschneidner, K.A., Pecharsky, V.K., Tsokol, A.O., (2005) Rep. Prog. Phys., 68 (6), p. 1479 Pecharsky, V.K., Gschneidner, K.A., (1997) Appl. Phys. Lett., 70 (24), p. 3299 Singh Niraj, K., Agarwal, S., Suresh, K.G., Nirmala, R., Nigam, A.K., Malik, S.K., (2005) Phys. Rev., 72, p. 014452 Pecharsky, V.K., Gschneidner, K.A., (1999) J. Magn. Magn. Mater., 200 (1-3), p. 44 Duc, N.H., Anh, T.K.D., Brommer, P.E., (2002) Physica, 319 (1-4), p. 1 Singh Niraj, K., Suresh, K.G., Nigam, A.K., (2003) Solid State Commun., 127 (5), p. 373 Khmelevskyi, S., Mohn, P., (2000) J. Phys.: Condens. Matter, 12 (45), p. 9453 Bloch, D., Ewards, D.M., Shimizu, M., Voiron, J., (1975) J. Phys. F.: Met. Phys., 5 (6), p. 1217 Inoue, J., Shimizu, M., (1982) J. Phys. F.: Met. Phys., 12 (8), p. 1811 Singh Niraj, K., Kumar, P., Suresh, K.G., Nigam, A.K., Coelho, A.A., Gama, S., (2007) J. Phys.: Condens. Matter, 19 (3), p. 036213 Duc, N.H., Hien, T.D., Brommer, P.E., Franse, J.J.M., (1992) J. Magn. Magn. Mater., 104-107, p. 1252 Duc, N.H., Brommer, P.E., (1999) Handbook of Magnetic Materials, 12, p. 259 Gopal, E.S.R., (1966) Specific Heats at Low Temperatures Baranov, N.V., Yermakov, A.A., Pirogov, A.N., Proshkin, A.V., Gvasaliya, S.N., Podlesnyak, A., (2006) Phys. Rev., 73 (10), p. 104445 Baranov, N.V., Bartashevich, M.I., Goto, T., Yermakov, A.A., Karkin, A.E., Pirogov, A.N., Teplykh, A.E., (1997) J. Alloys Compounds, 252 (1-2), p. 32 Baranov, N.V., Yermakov, A.A., Pirogov, A.N., Teplykh, A.E., Inoue, K., Yu, H., (1999) Physica, 269 (3-4), p. 284 Han, Z., Hua, Z., Wang, D., Zhang, C., Gu, B., Du, Y., (2006) J. Magn. Magn. Mater., 302 (1), p. 109