The effect of Ca-substitution in La-site on the magnetic properties of La{sub 2}CoMnO{sub 6}
Abstract
Double perovskite La{sub 2-x}Ca{sub x}CoMnO{sub 6} (x = 0, 0.1, 0.2, 0.5) ceramics samples were synthesized by the standard solid-state reaction method. The crystal structures have been confirmed to be monoclinic perovskite structure with space group of P2{sub 1}/n at room temperature by the powder x-ray diffraction (Cu-Kα). The grains of the samples are relatively dense and distribute in random directions from the scanning electron microscope patterns. Holes are doped into La{sub 2}CoMnO{sub 6} with the substitution of the Ca{sup 2+} ions in La-site, and further lead to the valences of Mn ions and Co ions transforming from Mn{sup 4+} and Co{sup 2+} to Mn{sup 3+} and Co{sup 3+}, respectively. Ferromagnetic coupling of Mn{sup 4+}-O{sup 2–}-Co{sup 2+} and antiferromagnetic coupling of Mn{sup 3+}-O{sup 2–}-Co{sup 3+} are coexistent in La{sub 2-x}Ca{sub x}CoMnO{sub 6} system, which correspond to two transitions existed in field-cooling magnetization versus temperature curves. Curie temperature of La{sub 2-x}Ca{sub x}CoMnO{sub 6} system decreases with the increasing of Ca-substitution amount. The coexistence of different magnetic phases leads to the exchange bias effect.
- Authors:
-
- Department of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 210096 (China)
- Publication Date:
- OSTI Identifier:
- 22308478
- Resource Type:
- Journal Article
- Journal Name:
- Journal of Applied Physics
- Additional Journal Information:
- Journal Volume: 116; Journal Issue: 3; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANTIFERROMAGNETISM; CALCIUM IONS; CERAMICS; COBALT COMPOUNDS; COBALT IONS; CURIE POINT; DOPED MATERIALS; LANTHANUM COMPOUNDS; MAGNETIC PROPERTIES; MAGNETIZATION; MANGANATES; MANGANESE IONS; MONOCLINIC LATTICES; OXYGEN IONS; PEROVSKITE; SCANNING ELECTRON MICROSCOPY; SPACE GROUPS; TEMPERATURE RANGE 0273-0400 K; X-RAY DIFFRACTION
Citation Formats
Li, Qiu-hang, Li, Na, Hu, Jian-zhong, Han, Qi, Ma, Qing-shan, Ge, Lei, Xiao, Biao, and Xu, Ming-xiang. The effect of Ca-substitution in La-site on the magnetic properties of La{sub 2}CoMnO{sub 6}. United States: N. p., 2014.
Web. doi:10.1063/1.4890321.
Li, Qiu-hang, Li, Na, Hu, Jian-zhong, Han, Qi, Ma, Qing-shan, Ge, Lei, Xiao, Biao, & Xu, Ming-xiang. The effect of Ca-substitution in La-site on the magnetic properties of La{sub 2}CoMnO{sub 6}. United States. https://doi.org/10.1063/1.4890321
Li, Qiu-hang, Li, Na, Hu, Jian-zhong, Han, Qi, Ma, Qing-shan, Ge, Lei, Xiao, Biao, and Xu, Ming-xiang. 2014.
"The effect of Ca-substitution in La-site on the magnetic properties of La{sub 2}CoMnO{sub 6}". United States. https://doi.org/10.1063/1.4890321.
@article{osti_22308478,
title = {The effect of Ca-substitution in La-site on the magnetic properties of La{sub 2}CoMnO{sub 6}},
author = {Li, Qiu-hang and Li, Na and Hu, Jian-zhong and Han, Qi and Ma, Qing-shan and Ge, Lei and Xiao, Biao and Xu, Ming-xiang},
abstractNote = {Double perovskite La{sub 2-x}Ca{sub x}CoMnO{sub 6} (x = 0, 0.1, 0.2, 0.5) ceramics samples were synthesized by the standard solid-state reaction method. The crystal structures have been confirmed to be monoclinic perovskite structure with space group of P2{sub 1}/n at room temperature by the powder x-ray diffraction (Cu-Kα). The grains of the samples are relatively dense and distribute in random directions from the scanning electron microscope patterns. Holes are doped into La{sub 2}CoMnO{sub 6} with the substitution of the Ca{sup 2+} ions in La-site, and further lead to the valences of Mn ions and Co ions transforming from Mn{sup 4+} and Co{sup 2+} to Mn{sup 3+} and Co{sup 3+}, respectively. Ferromagnetic coupling of Mn{sup 4+}-O{sup 2–}-Co{sup 2+} and antiferromagnetic coupling of Mn{sup 3+}-O{sup 2–}-Co{sup 3+} are coexistent in La{sub 2-x}Ca{sub x}CoMnO{sub 6} system, which correspond to two transitions existed in field-cooling magnetization versus temperature curves. Curie temperature of La{sub 2-x}Ca{sub x}CoMnO{sub 6} system decreases with the increasing of Ca-substitution amount. The coexistence of different magnetic phases leads to the exchange bias effect.},
doi = {10.1063/1.4890321},
url = {https://www.osti.gov/biblio/22308478},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 3,
volume = 116,
place = {United States},
year = {Mon Jul 21 00:00:00 EDT 2014},
month = {Mon Jul 21 00:00:00 EDT 2014}
}