Berezinskii-Kosterlitz-Thouless type scenario in the molecular spin liquid ACr2 O4(A=Mg,Zn,Cd)

Hemmida Mamoun; Krug Von Nidda Hans Albrecht; Tsurkan Vladimir; Loidl Alois

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HEMMIDA, Mamoun, KRUG VON NIDDA, Hans Albrecht, TSURKAN, Vladimir, LOIDL, Alois. Berezinskii-Kosterlitz-Thouless type scenario in the molecular spin liquid ACr2 O4(A=Mg,Zn,Cd). In: Physical Review B, 2017, vol. 95, p. 0. ISSN 2469-9950. DOI: https://doi.org/10.1103/PhysRevB.95.224101

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Physical Review B

Volumul 95 / 2017 / ISSN 2469-9950 /ISSNe 2469-9969

Berezinskii-Kosterlitz-Thouless type scenario in the molecular spin liquid ACr2 O4(A=Mg,Zn,Cd)

DOI:https://doi.org/10.1103/PhysRevB.95.224101

Pag. 0-0

Hemmida Mamoun¹, Krug Von Nidda Hans Albrecht¹, Tsurkan Vladimir¹², Loidl Alois¹

¹ University of Augsburg,
² Institute of Applied Physics, Academy of Sciences of Moldova

Disponibil în IBN: 19 februarie 2018

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The spin relaxation in chromium spinel oxides ACr2O4 (A= Mg, Zn, Cd) is investigated in the paramagnetic regime by electron spin resonance (ESR). The temperature dependence of the ESR linewidth indicates an unconventional spin-relaxation behavior, similar to spin-spin relaxation in the two-dimensional (2D) chromium-oxide triangular lattice antiferromagnets. The data can be described in terms of a generalized Berezinskii-Kosterlitz-Thouless (BKT) type scenario for 2D systems with additional internal symmetries. Based on the characteristic exponents obtained from the evaluation of the ESR linewidth, short-range order with a hidden internal symmetry is suggested.

Cuvinte-cheie
Antiferromagnetic materials, Chromium compounds, Electron energy analyzers, Electrospinning, Magnetic moments, Temperature distribution

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