Transport and magnetic study of the spin reorientation transition in the Tb-5(Si0.5Ge0.5)(4) magnetocaloric compound

• Tipo: Artigo em Revista Científica Internacional
• Data: 2005

Autores

araujo, jp (Autor) FCUP; pereira, am (Autor) FCUP; braga, me (Autor) Outra; pinto, rp (Autor) Outra; teixeira, jm (Autor) FCUP; correia, fc (Autor) Outra; sousa, jb (Autor) FCUP; morellon, l (Autor) Outra; algarabel, pa (Autor) Outra; magen, c (Autor) Outra; ibarra, mr (Autor) Outra

Revista

Título: Journal of Physics Condensed Matter

Vol. 17

Páginas: 4941-4949

ISSN: 0953-8984

Editora: Institute of Physics Publishing

Indexação

ISI Web of Knowledge - 14 Citações

Outras Informações

ID Authenticus: P-000-1X7

DOI: 10.1088/0953-8984/17/32/008

Abstract (EN): Detailed measurements of the electrical resistivity p(T), thermopower S(T) and magnetization of Tb-5(Si0.5Ge0.5)(4) in the vicinity of the spin reorientation transitions observed in this compound are reported. Our results indicate a complex spin reorientation process associated with three different lattice sites occupied by the Tb ions. We identify two critical transition temperatures: one at T-SR1 = 57 K, as previously reported, and a new one at T-SR2 = 40 K. A simple model based on an approximate magnetic anisotropy energy is presented; it gives a satisfactory qualitative description of the main features of the reorientation processes.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 9