Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/22240
Título: | Enhanced ferromagnetism and glassy state in phase separated La0.95Sr0.05MnO3 + δ |
Autor(es): | De, K. Das, S. Roy, A. Dhak, P. Willinger, M. Amaral, J. S. Amaral, V. S. Giri, S. Majumder, S. Silva, Carlos J. R. Gomes, M. J. M. Mahapatra, P. K. |
Palavras-chave: | Anti-ferromagnetic materials |
Data: | 21-Nov-2012 |
Editora: | AIP Publishing |
Revista: | Journal of Applied Physics |
Resumo(s): | Unusual high temperature ferromagentism is reported for La0.95Sr0.05MnO3+δ with Curie temperatures (TC1 and TC2) TC1 at 290 K and TC2 ∼ 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 5 K 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. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/22240 |
DOI: | 10.1063/1.4763460 |
ISSN: | 0021-8979 1089-7550 |
Versão da editora: | http://jap.aip.org/resource/1/japiau/v112/i10/p103907_s1?isAuthorized=no |
Arbitragem científica: | yes |
Acesso: | Acesso restrito UMinho |
Aparece nas coleções: | CDF - FMNC - Artigos/Papers (with refereeing) CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
K.DE.pdf Acesso restrito! | 170,56 kB | Adobe PDF | Ver/Abrir |