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Short-range and long-range magnetic order in Fe(Te1.5Se0.5) O5Cl

  • E. S. Kozlyakova
  • , K. N. Denisova
  • , A. A. Eliseev
  • , A. V. Moskin
  • , A. Y. Akhrorov
  • , P. S. Berdonosov
  • , V. A. Dolgikh
  • , B. Rahaman
  • , S. Das
  • , T. Saha-Dasgupta
  • , P. Lemmens
  • , A. N. Vasiliev
  • , O. S. Volkova

Research output: Contribution to journalArticleResearchpeer review

Abstract

Considerable attention has been paid recently to FeTe2O5Cl due to reduced dimensionality and frustration in the magnetic subsystem, succession of phase transitions, and multiferroicity. The efforts to grow its selenite sibling resulted in the mixed halide compound Fe(Te1.5Se0.5)O5Cl, which was found crystallizing in a different structural type and possessing properties drastically different from those of a parent system. Its magnetic subsystem features weakly coupled Fe3+-Fe3+ dimers showing the regime of short-range correlations at TM∼70K and long-range order at TN=22K. In a magnetically ordered state, sizable spin-orbital interactions lead to a small canting of Fe3+ moments. Magnetic dipole-dipole interactions contribute significantly to the experimentally observed orientation of magnetization easy axis in the ac plane. The first principles calculations of leading exchange interactions were found in agreement with measurements of thermodynamic properties and Raman spectroscopy.

Original languageEnglish
Article number214405
JournalPhysical Review B
Volume102
Issue number21
DOIs
Publication statusPublished - 3 Dec 2020
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • QuantumFrontiers: Cluster of Excellence 2123/1: Light and Matter at the Quantum Frontier

    Schmidt, P. O. (Principal Investigator), Ospelkaus-Schwarzer, S. (Principal Investigator), Chichkov, B. (Principal Investigator), Danzmann, K. (Principal Investigator), Ertmer, W. (Principal Investigator), Hammerer, K. J. (Principal Investigator), Haug, R. (Principal Investigator), Heinzel, G. (Principal Investigator), Heurs, M. (Principal Investigator), Klempt, C. (Principal Investigator), Kroker, S. (Principal Investigator), Lisdat, C. (Principal Investigator), Mehlstäubler, T. (Principal Investigator), Müller, J. (Principal Investigator), Ospelkaus, C. (Principal Investigator), Rasel, E. M. (Principal Investigator), Recher, P. (Principal Investigator), Santos, L. S. (Principal Investigator), Schilling, M. (Principal Investigator), Schlickum, U. (Principal Investigator), Schumacher, H. W. (Principal Investigator), Surzhykov, A. (Principal Investigator), Waag, A. (Principal Investigator), Werner, R. (Principal Investigator) & Willke, B. (Principal Investigator)

    1 Jan 201931 Dec 2025

    Project: Research

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