Enhanced ferromagnetism and glassy state in phase separated La0.95Sr0.05MnO3+delta

• Tipo: Artigo em Revista Científica Internacional
• Data: 2012

Autores

De, K (Autor) Outra; Das, S (Autor) Outra; Roy, A (Autor) Outra; Dhak, P (Autor) Outra; Willinger, M (Autor) Outra; amaral, j. s. (Autor) FCUP; Amaral, V. S. (Autor) Outra; Giri, S (Autor) Outra; Majumder, S (Autor) Outra; Silva, CJR (Autor) Outra; Gomes, MJM (Autor) Outra; Mahapatra, PK (Autor) Outra

Revista

Título: Journal of Applied Physics

Vol. 112

ISSN: 0021-8979

Editora: American Institute of Physics

Indexação

ISI Web of Knowledge - 7 Citações

Scopus - 7 Citações

Outras Informações

ID Authenticus: P-002-3DD

DOI: 10.1063/1.4763460

Abstract (EN): Unusual high temperature ferromagentism is reported for La0.95Sr0.05MnO3 + delta with Curie temperatures (T-C1 and T-C2) T-C1 at 290K and T-C2 similar to 150 K. Weak antiferromagnetism (AFM) is thought to give low moment, low temperature irreversibility, and non-saturation up to 10 T at 5 K. A short-range ferromagnetism is predicted from well-defined hysteresis at 5K and field-cooled (FC) magnetization curves. Strong irreversibility between zero field-cooled (ZFC) and FC at 5 T is due to "hard" spins, not from ferromagnetic clusters. Field-dependent peak shift of spin freezing temperature in ZFC, memory effect, magnetic relaxation shows cluster glass like transition in the system. A metal-insulator transition at 115 K also implies a completion of percolation of short range ferromagnetic clusters, giving an onset of metallic state at 115 K. A complete magnetic phase diagram is presented showing its temperature dependent rich magnetic behavior. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4763460]

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6