Magnetoelastic coupling in CuFeO2
作者： G Quirion , M J Tagore , M L Plumer , O A Petrenko
DOI: 10.1088/1742-6596/145/1/012070
关键词: Structural transition 、 Condensed matter physics 、 Coupling (physics) 、 Magnetism 、 Zero field 、 Context (language use) 、 Materials science 、 Classical mechanics 、 Softening 、 Ultrasonic velocity 、 Magnetoelastic coupling
摘要: Ultrasonic velocity data obtained on CuFeO2 are re-analyzed in the context of a Landau free energy which includes spin-lattice coupling. This comprehensive model simultaneously accounts for elastic and magnetic properties at zero field. Softening constants C11, C44, especially C66, ineluctably indicates that R3m ? C2/m structural transition TN1 = 13.7 K is primarily pseudoproper ferroelastic. The present analysis also suggests anomalies observed TN2 dominated by magnetoelastic coupling strengthens conclusion unusual consequence interplay between its magnetism deformations.
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