In:
Modern Physics Letters B, World Scientific Pub Co Pte Ltd, Vol. 26, No. 31 ( 2012-12-20), p. 1250211-
Abstract:
We have investigated the chemical pressure effects, induced by the substitution of smaller ionic radius Y 3+ for La 3+ , on the magnetic and electrical transport properties for the La 0.7-x Y x Ca 0.3 CoO 3 (x = 0, 0.05, 0.1, and 0.15). The magnetization and the Curie temperature T C decrease sharply as the doping level of Y 3+ increases, which indicates that the chemical pressure induced by Y 3+ -doping can suppress the ferromagnetism. The transport measurement reveals a chemical pressure-induced increase of the resistivity due to a suppression of e g -electron hopping. We thought that the effect of Y 3+ -doping induced chemical pressure on the ferromagnetic (FM) phase has a similar behavior to that of external pressure. These results imply that the enhancing chemical pressure can suppress the FM phase in La 0.7-x Y x Ca 0.3 CoO 3 .
Type of Medium:
Online Resource
ISSN:
0217-9849
,
1793-6640
DOI:
10.1142/S0217984912502119
Language:
English
Publisher:
World Scientific Pub Co Pte Ltd
Publication Date:
2012