Spin-lattice-charge coupling in quasi-one-dimensional spin-chain NiTe2 O5

Ajay Tiwari, D. Chandrasekhar Kakarla, G. Macam, C. H. Hsu, F. C. Chuang, H. C. Wu, T. W. Kuo, Arkadeb Pal, H. Chou, D. P. Gulo, H. L. Liu, Y. C. Chuang, Y. C. Lai, C. A. Lee, Mitch M.C. Chou, H. D. Yang

研究成果: 雜誌貢獻期刊論文同行評審


A high-quality NiTe2O5 single crystal was grown via the flux method and characterized using synchrotron x-ray diffraction (XRD) and electron probe microscopy techniques. The dc magnetization (M) confirms the antiferromagnetic long-range ordering temperature (TN) at 28.5 K. An apparent domelike dielectric anomaly near TN, with scaling of magnetodielectric (MD) coupling with magnetization (MD% ∝ M2), signifies higher-order magnetoelectric (ME) coupling. The critical finding is that magnetoelastic coupling plays a pivotal role in bridging the electrical and magnetic dipoles, which was further confirmed by temperature-dependent XRD. In addition, the theoretical charge density difference maps indicate that the emergence of electrical dipoles between the Ni and O atoms below TN originates through p-d hybridization. Thus, the p-d hybridization-induced magnetoelastic coupling is considered a possible mechanism for the higher-order ME effect in this quasi-one-dimensional spin-chain NiTe2O5.

期刊Physical Review Materials
出版狀態已發佈 - 2022 4月

ASJC Scopus subject areas

  • 材料科學(全部)
  • 物理與天文學(雜項)


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