多铁LiCoPO4的光谱研究：磁结构相变

IF 1.4 4区物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY

JETP Letters Pub Date : 2025-03-25 DOI:10.1134/S0021364024604603

S. A. Klimin, A. D. Molchanova, V. A. Chernyshev, V. N. Denisov, N. N. Novikova, V. A. Yakovlev

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引用次数: 0

摘要

研究了LiCoPO4多铁材料的低频激发。在反铁磁有序温度以下的透射光谱中，观察到各种来源的新谱线，并伴有自发电极化现象的出现。这些谱线大多与磁激励相对应。首次发现了反铁磁态新声子的出现，这使得将相变分类为磁结构相变成为可能。首次获得了LiCoPO4红外主动B1u和B2u模式的频率信息。这些数据与从头计算结果很好地吻合。

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Spectroscopic Study of the Multiferroic LiCoPO4: Magnetostructural Phase Transition

The low-frequency excitations of the LiCoPO₄ multiferroic have been studied. New lines of various origins have been observed in the transmission spectra below the temperature of antiferromagnetic ordering, which is accompanied by the appearance of spontaneous electric polarization. Most of these lines correspond to magnetic excitations. The appearance of new phonons in the antiferromagnetic state has been detected for the first time, which makes it possible to classify the phase transition as a magnetostructural phase transition. Information on the frequencies of infrared-active B_1u and B_2u modes of LiCoPO₄ has been obtained for the first time. These data are in good agreement with the ab initio calculations.

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来源期刊

JETP Letters 物理-物理：综合

CiteScore

2.40

自引率

30.80%

发文量

164

审稿时长

3-6 weeks

期刊介绍： All topics of experimental and theoretical physics including gravitation, field theory, elementary particles and nuclei, plasma, nonlinear phenomena, condensed matter, superconductivity, superfluidity, lasers, and surfaces.