Transport and magnetic properties in the ferromagnetic regime of La1-xCaxMnO3 - art. no. 092504

Authors
Hong, CS Kim, WS Hur, NH
Citation
Cs. Hong et al., Transport and magnetic properties in the ferromagnetic regime of La1-xCaxMnO3 - art. no. 092504, PHYS REV B, 6309(9), 2001, pp. 2504
Citations number
29
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6309
Issue
9
Year of publication
2001
Database
ISI
SICI code
0163-1829(20010301)6309:9<2504:TAMPIT>2.0.ZU;2-1
Abstract
The transport and magnetic properties of single crystals of La1-xCaxMnO3 (x = 0.2, 0.3) have been investigated. The transport and magnetization result s of the ferromagnetic insulator, La0.8Ca0.2MnO3, are quite different from those of La0.7Ca0.3MnO3 that falls into a ferromagnetic metal. We have foun d that the paramagnetic to ferromagnetic transitions observed in La0.8Ca0.2 MnO3 and La0.7Ca0.3MnO3 are second and first order using the Banerjee crite rion, respectively. The observation of magnetic frustration and Heisenberg exponents derived by the modified Arrott plot favors the existence of short -range charge/orbital ordering in La0.8Ca0.2MnO3 and even in La0.7Ca0.3MnO3 .