[Zurück]

N. Baranov, K. Inoue, H. Michor, G. Hilscher, A. A. Yermakov:
"Spin fluctuations in Gd₃Rh induced by f-d exchange: the influence on the T-linear specific heat";
Journal of Physics: Condensed Matter, 15 (2003), S. 531 - 538.

Spin fluctuations in Gd3Rh induced by f?d exchange: the influence on the T-linear specific heat
N V Baranov1,2,5, K Inoue3, H Michor4, G Hilscher4 and A A Yermakov1,2
1 Institute of Metal Physics, Russian Academy of Science, 620219 Ekaterinburg, Russia
2 Institute of Physics and Applied Mathematics, Ural State University, Lenin Avenue 51, 620083 Ekaterinburg, Russia
3 Institute for Molecular Science, Myodaiji, Okazaki 444, Japan
4 Institut für Festkörperphysik, TU Wien, A-1040 Wien, Austria

E-mail: nikolai.baranov@usu.ru
5 Author to whom any correspondence should be addressed.

Received 3 October 2002
Published 13 January 2003

Abstract. The results of specific heat, magnetization and magnetic susceptibility measurements for the antiferromagnetic (AF) compound Gd3Rh are presented. Below its Néel temperature TN = 112 K, this compound exhibits a field-induced phase transition from the AF to the ferromagnetic state in a relatively small magnetic field (~0.4 T). Specific heat measurements revealed a giant enhancement of the coefficient of the T-linear specific heat in Gd3Rh ( [gamma] = 118 mJ mol-1 K-2) in comparison with that observed for the isostructural nonmagnetic partner Y3Rh ( [gamma] = 11 mJ mol-1 K-2). An anomalous behaviour of the heat capacity as well as a set of peculiarities of magnetic properties in Gd3Rh are associated with the existence of spin fluctuations induced by f?d exchange interaction in the d-electron subsystem that arises from features of the crystal and electronic structure of the R3M-type compounds.

http://aleph.ub.tuwien.ac.at/F?base=tuw01&func=find-c&ccl_term=AC04405741

http://stacks.iop.org/0953-8984/15/531