Site-selective quantum correlations revealed by magnetic anisotropy in the tetramer system SeCuO3

I. Živković, D. M. Djokić, M. Herak, D. Pajić, K. Prša, P. Pattison, D. Dominko, Z. Micković, D. Cinčić, L. Forró, H. Berger, and H. M. Rønnow
Phys. Rev. B 86, 054405 – Published 6 August 2012

Abstract

We present the investigation of a monoclinic compound SeCuO3 using x-ray powder diffraction, magnetization, torque, and electron-spin-resonance. Structurally based analysis suggests that SeCuO3 can be considered as a three-dimensional network of tetramers. The values of intratetramer exchange interactions are extracted from the temperature dependence of the susceptibility and amount to 200 K. The intertetramer coupling leads to the development of long-range antiferromagnetic order at TN=8 K. An unusual temperature dependence of the effective g tensors is observed, accompanied with a rotation of macroscopic magnetic axes. We explain this unique observation as due to site-selective quantum correlations.

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  • Received 30 April 2012

DOI:https://doi.org/10.1103/PhysRevB.86.054405

©2012 American Physical Society

Authors & Affiliations

I. Živković1, D. M. Djokić2, M. Herak1,3, D. Pajić4,5, K. Prša2, P. Pattison6, D. Dominko1, Z. Micković2, D. Cinčić7, L. Forró2, H. Berger2, and H. M. Rønnow2

  • 1Institute of Physics, Bijeniˇka 46, HR-10000 Zagreb, Croatia
  • 2Institute of Condensed Matter Physics, EPFL, CH-1015 Lausanne, Switzerland
  • 3Jožef Stefan Institute, Jamova 39, SL-1000 Ljubljana, Slovenia
  • 4Department of Physics, Faculty of Science, Bijenicka c.32, HR-10000 Zagreb, Croatia
  • 5Institute of Mathematics, Physics and Mechanics, Jadranska c. 19, SL-1000 Ljubljana, Slovenia
  • 6ESRF, SNBL, F-38042 Grenoble 9, France
  • 7Department of Chemistry, Faculty of Science, Horvatovac 102A, HR-10000 Zagreb, Croatia

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Issue

Vol. 86, Iss. 5 — 1 August 2012

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