Magnetic and structural properties of La1-xGdxCoO3 compounds

authors	Panfilov, AS; Grechnev, GE; Lyogenkaya, AA; Pashchenko, VA; Vasylechko, LO; Hreb, VM; Kovalevsky, AV
nationality	International
journal	PHYSICA B-CONDENSED MATTER
author keywords	La1-xGdxCoO3 compounds; Magnetic susceptibility; Spin states crossover; Chemical pressure effect
keywords	SPIN-STATE TRANSITION; COBALT OXIDES; PRESSURE; LACOO3
abstract	We present a study of magnetic and structural properties of La1-xGdxCoO3 compounds with x = 0, 0.2, 0.5 and 1. The Gd term in magnetic susceptibility obeys the Curie-Weiss law with antiferromagnetic interaction between the magnetic moments of Gd3+ ions. The value of the paramagnetic Curie temperature.. is proportional to Gd content and for GdCoO3 it reaches Theta similar or equal to -5.5 K. The Co contribution, chi(Co)(T), derived by subtracting the Gd term from the total susceptibility, shows a non-monotonous behavior which is originated by the temperature induced transition of Co3+ ions from the ground low spin state to a higher spin state separated by an energy Delta The revealed strong increase in.. with increasing Gd content is presumably due to the manifestation of a chemical pressure upon replacing La with Gd having a smaller ionic size.
publisher	ELSEVIER
issn	0921-4526
isbn	1873-2135
year published	2021
volume	609
digital object identifier (doi)	10.1016/j.physb.2021.412848
web of science category	6
subject category	Physics, Condensed Matter
unique article identifier	WOS:000643709000001