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http://hdl.handle.net/10773/31718| Title: | Magnetic and structural properties of La1−xGdx CoO3 compounds |
| Author: | Panfilov, Anatoly S. Grechnev, Gennadiy E. Lyogenkaya, Anastasiya A. Pashchenko, Volodymyr A. Vasylechko, Leonid O. Hreb, Vasyl M. Kovalevsky, Andrei V. |
| Keywords: | La1−x Gdx CoO3 compounds Magnetic susceptibility Spin states crossover Chemical pressure effect |
| Issue Date: | 15-May-2021 |
| Publisher: | Elsevier |
| 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 Θ is proportional to Gd content and for GdCoO3 it reaches Θ ' −5.5 K. The Co contribution, χCo(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 ∆. 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. |
| Peer review: | yes |
| URI: | http://hdl.handle.net/10773/31718 |
| DOI: | 10.1016/j.physb.2021.412848 |
| ISSN: | 0921-4526 |
| Appears in Collections: | CICECO - Artigos DEMaC - Artigos |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Magnetic and structural properties.pdf | 1.47 MB | Adobe PDF | View/Open |
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