Pressure effects on spin-lattice coupling of CdCr2S4

• Tipo: Artigo em Revista Científica Internacional
• Data: 2017

Autores

Oliveira, GNP (Autor) FCUP; dos Santos, AM (Autor) Outra; Gai, Z (Autor) Outra; Halder, G (Autor) Outra; araujo, j. p. (Autor) FCUP; Lopes, AML (Autor) Outra; pereira, a. m. (Autor) FCUP

Revista

Título: Journal of Alloys and Compounds

Vol. 715

Páginas: 83-90

ISSN: 0925-8388

Editora: Elsevier

Indexação

ISI Web of Knowledge - 1 Citação

Scopus - 2 Citações

Outras Informações

ID Authenticus: P-00M-SMQ

DOI: 10.1016/j.jallcom.2017.04.265

Abstract (EN): Results of DC magnetization and x-ray diffraction measurements under hydrostatic pressure are reported for the CdCr2S4 spinel compound. Magnetization measurements were performed in a polycrystalline sample up to 14 kbar in the 20-220 K temperature range. At low applied magnetic fields an anomalous susceptibility behavior, associated to magnetic clusters, persists up to 14 kbar. X-ray synchrotron diffraction spectra acquired under pressure show a strong linear correlation between the variation of lattice parameters under pressure and the variation of the Cr-Cr distance. In contrast, the S-Cr-S angles remain constant. Clearly, the CdCr2S4 magnetic properties are strongly sensitive to pressure variations and the Cr local distortions observed in this compound promote a competition between direct antifer-romagnetic and super-exchange ferromagnetic interactions within such short-range magnetic clusters.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8