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
|