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arXiv · 2503.06043

Highly Entangled Magnetodielectric and Magnetostriction effects, and Spin-Phonon coupling in the Antiferromagnetic Ni$_2$ScSbO$_6$

Neha Patel·Arkadeb Pal·C. W. Wang·G. R. Blake·J. Khatua·T. W. Yen·Susaiammal Arokiasamy·H. S. Kunwar·Y. C. Lai·Y. C. Chuang·V. Sathe·Kwang-Yong Choi·H. D. Yang·Sandip Chatterjee
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Abstract

Magnetic systems with noncentrosymmetric crystal structures are renowned for their complex magnetic ordering and diverse and fascinating physical properties. In this report, we provide a comprehensive study of the chiral magnetic system Ni$_2$ScSbO$_6$, which exhibits a robust incommensurate long-range antiferromagnetic spin ordering at a temperature of $T_N = 62$~K, as revealed by bulk magnetization, specific heat, and neutron diffraction studies. This magnetic ordering triggers a series of intriguing phenomena, including prominent magnetodielectric coupling manifested by a dielectric peak at $T_N$, significant spin-phonon coupling resulting in strong phonon renormalization characterized by anomalous softening of various Raman modes, and a remarkable volume magnetostriction effect probed by high-resolution synchrotron X-ray diffraction. These phenomena are intricately interlinked, positioning the present system as a rare and interesting material.

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Neha Patel, Arkadeb Pal, C. W. Wang, G. R. Blake, J. Khatua, T. W. Yen, Susaiammal Arokiasamy, H. S. Kunwar, Y. C. Lai, Y. C. Chuang, V. Sathe, Kwang-Yong Choi, H. D. Yang, Sandip Chatterjee. 2025-03-08. Highly Entangled Magnetodielectric and Magnetostriction effects, and Spin-Phonon coupling in the Antiferromagnetic Ni$_2$ScSbO$_6$. https://arxiv.org/abs/2503.06043

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