Evidence of Development of New Spin Orders Benefiting to Enhance Magnetic Properties in Co2+-Doped Delafossite-Type Oxide CuCrO2
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- 作者：T. Elkhouni (1) (4)
M. Amami (1) (3)
P. Strobel (2)
A. Ben Salah (1)
1. Laboratoire des Sciences de Mat茅riaux et d鈥檈nvironnement ; Facult茅 des Sciences de Sfax ; BP 763 ; 3038 ; Sfax ; Tunisia
4. Laboratoire de Valorisation des Mat茅riaux Utiles ; Centre National des Recherches en Sciences des Mat茅riaux ; Borj Cedria ; BP 174 ; 1164 ; Hammam-Chatt ; Tunis ; Tunisia
3. Unit茅 de Recherche de Chimie des Mat茅riaux ; ISSBAT ; Universit茅 Tunis El Manar ; 9 ; Avenue Dr. Zouhaier Safi ; 1006 ; Tunis ; Tunisia
2. Institut N茅el ; CNRS ; Universit茅 Joseph Fourier ; B.P. 166 ; 38042 ; Grenoble Cedex 9 ; France - 关键词：Delafossite oxides ; XRD ; Magnetic properties ; Raman spectroscopy ; Dielectric permittivity
- 刊名：Journal of Superconductivity Incorporating Novel Magnetism
- 出版年：2015
- 出版时间：January 2015
- 年：2015
- 卷：28
- 期：1
- 页码：1-8
- 全文大小：1,367 KB
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- 刊物主题：Physics
Superconductivity, Superfluidity and Quantum Fluids
Magnetism and Magnetic Materials
Condensed Matter
Characterization and Evaluation Materials - 出版者：Springer New York
- ISSN：1557-1947
文摘
This paper reports the effect of high-spin Co2+-doped CuCrO2 delafossite-type oxide on the structure and physical properties. X-ray diffraction and Raman spectroscopy show that the structure is maintained for all Co-doped samples for chromium. The incorporation of this element generates anisotropic microstrains in the structure. The temperature dependence of zero field-cooling magnetization was measured. All samples exhibit an AFM transition around 24 K. The high-spin state and the shift due to the exchange splitting of the conduction band suggest strong hybridization between carriers in the Cr 3d t2g band and the t2g states of the high-spin Co2+ to develop other spin orders benefiting to enhance magnetic susceptibility and support the evidence of new FM transition. The coupling between the magnetic order and ferroelectric order is also characterized.