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

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 behavio...

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Bibliographic Details
Published in:Physical review. B 2018-08, Vol.98 (5), p.054409
Main Authors: Cvitanić, Tonči, Šurija, Vinko, Prša, Krunoslav, Zaharko, Oksana, Kupčić, Ivan, Babkevich, Peter, Frontzek, Matthias, Požek, Miroslav, Berger, Helmuth, Magrez, Arnaud, Rønnow, Henrik M, Grbić, Mihael S, Živković, Ivica
Format: Article
Language:English
Subjects:
Antiferromagnetism
Magnetic moments
Magnetic resonance
Magnetic structure
Order parameters
Online Access:Get full text
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Summary: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=8K 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
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.98.054409