Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2001

Идентификатор DOI: 10.1103/PhysRevB.63.184425

Аннотация: Magnetic susceptibility, magnetization, specific-heat, and positive muon spin relaxation (µSR) measurements have been used to characterize the magnetic ground state of the spinel compound CuGa2O4. We observe a spin-glass transition of the S=1/2 Cu2+ spins below Tf = 2.5 K characterized by a cusp in the susceptibility curve which is suppressed when a magnetic field is applied. We show that the magnetization of CuGa2O4 depends on the magnetic history of the sample. Well below Tf, the muon signal resembles the dynamical Kubo-Toyabe expression reflecting that the spin freezing process in CuGa2O4 results in a Gaussian distribution of the magnetic moments. By means of Monte Carlo simulations, we obtain the relevant exchange integrals between the Cu2+ spins in this compound. © 2001 The American Physical Society.

Журнал: Physical Review B: Condensed Matter and Materials Physics

Выпуск журнала: Т. 63, № 18

ISSN журнала: 10980121

Издатель: American Physical Society

• Petrakovskii G.A. (Institute of Physics,Academy of Sciences)
• Aleksandrov K.S. (Institute of Physics,Academy of Sciences)
• Bezmaternikh L.N. (Institute of Physics,Academy of Sciences)
• Aplesnin S.S. (Institute of Physics,Academy of Sciences)
• Roessli B. (Laboratory for Neutron Scattering,Paul Scherrer Institute and ETH Zurich)
• Semadeni F. (Laboratory for Neutron Scattering,Paul Scherrer Institute and ETH Zurich)
• Amato A. (Laboratory for Muon-Spin Spectroscopy,Paul Scherrer Institute)
• Baines C. (Laboratory for Muon-Spin Spectroscopy,Paul Scherrer Institute)
• Bartolomé J. (Instituto de Ciencia de Materiales de Aragón,CSIC-Universidad de Zaragoza,Ciudad Universitaria)
• Evangelisti M. (Instituto de Ciencia de Materiales de Aragón,CSIC-Universidad de Zaragoza,Ciudad Universitaria)

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