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http://hdl.handle.net/10773/19370
Title: | Magnetic and structural phase transitions in La0.5Sr0.5CoO3-delta (0 <= delta < 0.3) cobaltites |
Author: | Karpinsky, D. V. Troyanchuk, I. O. Lobanovsky, L. S. Chobot, A. N. Ritter, C. Efimov, V. Sikolenko, V. Kholkin, A. L. |
Keywords: | CRYSTAL-STRUCTURE SPIN-STATE THIN-FILMS MAGNETORESISTANCE LA1-XSRXCOO3 LACOO3 FERROMAGNETISM ORIGIN ORDER |
Issue Date: | 2013 |
Publisher: | IOP PUBLISHING LTD |
Abstract: | The evolution of the crystal structure and the magnetic properties was investigated in the La0.5Sr0.5CoO3-delta (0 < delta < 0.3) system as a function of the oxygen deficit delta. Compounds with a low oxygen deficit (delta < 0.1) are shown to be predominantly ferromagnetic, while further increase (delta > 0.1) gradually changes the magnetic structure from ferromagnetic to G-type antiferromagnetic and causes a structural transition from rhombohedral to cubic symmetry. Resistivity and magnetoresistance at low temperature increase with increasing of oxygen vacancies. It is argued that oxygen reduction facilitates stabilization of the high spin state of Co3+ ions. Antiferromagnetic interactions between cobalt ions in the high spin state are found to dominate in compounds with the oxygen deficit delta > 0.18. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/19370 |
DOI: | 10.1088/0953-8984/25/31/316004 |
ISSN: | 0953-8984 |
Publisher Version: | 10.1088/0953-8984/25/31/316004 |
Appears in Collections: | CICECO - Artigos |
Files in This Item:
File | Description | Size | Format | |
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Magnetic and structural phase transitions in La0.5Sr0.5CoO3-delta (0 = delta 0.3) cobaltites_10.10880953-89842531316004.pdf | 683.27 kB | Adobe PDF |
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