ANOMALOUS BEHAVIOR OF THE ELECTRICAL-RESISTIVITY OF Y2FE14B

• Tipo: Outra Publicação em Revista Científica Internacional
• Data: 1991

Autores

sousa, j. b. (Autor) FCUP; AMADO, MM (Autor) Outra; PINTO, RP (Autor) Outra; M. A. Salgueiro da Silva (Autor) FCUP; BRAGA, ME (Autor) Outra; BUSCHOW, KHJ (Autor) Outra

Revista

Título: Journal of Physics Condensed Matter

Vol. 3

Páginas: 4119-4123

ISSN: 0953-8984

Editora: Institute of Physics Publishing

Indexação

ISI Web of Knowledge - 8 Citações

Scopus - 10 Citações

Outras Informações

ID Authenticus: P-001-QNP

DOI: 10.1088/0953-8984/3/22/023

Abstract (EN): Accurate measurements of the electrical resistivity (rho) and its temperature derivative (d-rho/dT) in the ferromagnet Y2Fe14B have been made from 4-750 K, and the results have been compared with those previously obtained for Nd2Fe14B. In both cases rho-(T) increases rapidly at low temperatures, approaching quasi-saturation well below the Curie point (T(c)). The weak resistivity singularity near T(c) is anomalous, giving negative d-rho/dT values. Small humps also occur in rho-(T) just below T(c). The critical analysis of these results indicates that the low-temperature anomaly is likely to be associated with spin-fluctuation effects, whereas the hump effects below T(c) are related to the giant Invar effect in these compounds.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5