Singlet state formation and its impact on the magnetic structure in the tetramer system SeCuO3 (CROSBI ID 253450)
Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija
Podaci o odgovornosti
Cvitanić, Tonči ; Šurija, Vinko ; Prša, Krunoslav ; Zaharko, Oksana ; Kupčić, Ivan ; Babkevich, Peter ; Frontzek, Matthias ; Požek, Miroslav ; Berger, Helmuth ; Magrez, Arnaud ; Ronnow, Henrik M. ; Grbić, Mihael S. ; Živković, Ivica
engleski
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 di raction 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 beta = 0.32 in agreement with a 3D 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 non-equivalent copper sites, m(Cu1) ~ 0.35 uB and m(Cu2) < 0.8 uB at 1.5 K.
NMR ; neutrons ; singlet ; tetramer ; quantum magnetism
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Podaci o izdanju
98 (5)
2018.
054409-1-054409-8
objavljeno
2469-9950
2469-9969
10.1103/PhysRevB.98.054409