Publication Date:
2015-04-23
Description:
The magnetic and electrical properties in phase-separated La 0.7 Ca 0.3 Mn 0.9 Cu 0.1 O 3 perovskite were studied in detail. Experimental results show that the substitution of Cu at Mn-site suppresses the ferromagnetic (FM) phase of La 0.7 Ca 0.3 MnO 3 matrix and induces a charge ordering transition at ∼146 K. At ∼256 K, a Griffiths-like behaviour is observed. At low temperatures, the occurrence of an irreversible metamagnetic transition associated with a large relaxation rate is analyzed, clearly indicating the dynamic phase coexistence and evolution of FM islands. A magnetic phase diagram is finally constructed based on the magnetic measurements, summarizing the dynamic evolution process of phase separation.
Print ISSN:
0021-8979
Electronic ISSN:
1089-7550
Topics:
Physics