Singlet state formation and its impact on the magnetic structure in the tetramer system SeCuO3

Cvitanić, Tonči and Šurija, Vinko and Prša, Krunoslav and Zaharko, Oksana and Kupčić, Ivan and Babkevich, Peter and Frontzek, Matthias and Požek, Miroslav and Berger, Helmut and Magrez, Arnaud and Rønnow, Henrik M. and Grbić, Mihael Srđan and Živković, Ivica (2018) Singlet state formation and its impact on the magnetic structure in the tetramer system SeCuO3. Physical Review B, 98 (5). pp. 54409-8. ISSN 1098-0121

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Abstract

We present an experimental investigation of the magnetic structure in a tetramer system SeCuO3 using neutron powder-diffraction and nuclear resonance techniques. We establish a commensurate antiferromagnetic ordering with a propagation vector k = (0, 0, 1). The order parameter follows a critical behavior near TN = 8 K with a critical exponent β = 0.32 in agreement with a three-dimensional universality class. Evidence is presented that a singlet state starts to form on tetramers at temperatures as high as 200 K, and its signature is preserved within the ordered state through a strong renormalization of the ordered magnetic moment on two nonequivalent copper sites mCu1 ≈ 0.35μB and mCu2 < 0.8μB at 1.5 K.

Item Type: Article
Keywords: NMR, neutrons, singlet, tetramer, quantum magnetism
Date: 2018
Subjects: NATURAL SCIENCES > Physics
Additional Information: © 2018 American Physical Society. Received 11 January 2018; revised manuscript received 26 June 2018; published 9 August 2018.
Divisions: Faculty of Science > Department of Physics
Project code: IP-2013-11-2729, UKF 20/15
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 12 Sep 2018 07:47
Last Modified: 12 Sep 2018 07:47
URI: http://digre.pmf.unizg.hr/id/eprint/5856

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