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

• Type: Article in International Scientific Journal
• Date: 2012

Authors

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

Journal

Title: Journal of Applied Physics

Vol. 112

ISSN: 0021-8979

Publisher: American Institute of Physics

Indexing

ISI Web of Knowledge - 7 Citations

Scopus - 7 Citations

Other information

Authenticus ID: 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]

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6