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http://dx.doi.org/10.6111/JKCGCT.2021.31.3.112

Evidence of spin-phonon coupling in La2NiMnO6 double perovskite  

Nasir, Mohammad (Department of Materials Science and Engineering, Dankook University)
Ahmed, Ateeq (Department of Materials Science and Engineering, Chosun University)
Park, Hee Jung (Department of Materials Science and Engineering, Dankook University)
Sen, Somaditya (Department of Physics, Indian Institute of Technology Indore)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.31, no.3, 2021 , pp. 112-115 More about this Journal
Abstract
Herein, a correlation between B-site cation order and spin-phonon coupling in La2NiMnO6 double perovskite has been investigated. Raman spectra of La2NiMnO6 double perovskite annealed at 950 and 1400℃ have been measured in the 140-598 K range. A substantial softening of the phonon modes has been observed below the Curie temperature, which emphasized the presence of the spin-phonon coupling in the system. The spin-phonon coupling was found to be stronger in relatively more ordered La2NiMnO6 double perovskite. Thus, the magnitude of spin-phonon coupling was influenced by the Ni/Mn cation order.
Keywords
Spin-phonon coupling; Antisite disorder; Cation ordering; Raman spectroscopy; Ferromagnetism;
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