Low-temperature magnetization step and its training effects in phase-separated La0.5Ca0.5MnO3

Citation
Rw. Li et al., Low-temperature magnetization step and its training effects in phase-separated La0.5Ca0.5MnO3, J PHYS-COND, 13(9), 2001, pp. 1973-1978
Citations number
22
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF PHYSICS-CONDENSED MATTER
ISSN journal
0953-8984 → ACNP
Volume
13
Issue
9
Year of publication
2001
Pages
1973 - 1978
Database
ISI
SICI code
0953-8984(20010305)13:9<1973:LMSAIT>2.0.ZU;2-D
Abstract
We observed a magnetization step accompanied by a metal-insulator transitio n around 75 K in La0.5Ca0.5MnO3. Repeating measurements under the same cond ition weaken the magnetization step and enhance the resistance at low tempe rature. The decayed magnetization step reappears after annealing the sample at high temperature or cooling it under a magnetic field. The low-temperat ure magnetization step can be attributed to the melting of the overcooled f erromagnetic fragments and its training effect may be related to structure distortions at the interfaces between the ferromagnetic and charge-ordered phases in the investigated system.