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Eu2CuO4: An anisotropic Van Vleck paramagnet.
Authors
J Barnett
SW Cheong
+7 more
Z Fisk
SB Oseroff
D Rao
S Schultz
JD Thompson
M Tovar
DC Vier
Publication date
1 February 1989
Publisher
eScholarship, University of California
Abstract
Magnetic susceptibility measurements have shown anisotropic Van Vleck paramagnetism in Eu2CuO4 single crystals. This behavior is associated with the singlet ground state (7F0) of Eu3+ ions, and the measured anisotropy is related to a crystal-field splitting of the excited multiplets (7FJ). From the experimental data at low temperatures (T50 K) a crystal-field parameter A20r2=-93(5) cm-1 and a spin-orbit coupling constant =303(15) cm-1 have been estimated. The temperature dependence of the magnetic susceptibility is predicted in terms of the Boltzmann population of the excited multiplets, and a comparison with experimental data up to 350 K is made. The possibility of a magnetic contribution arising from the Cu ions is discussed in connection with some discrepancies observed between the experimental and calculated magnetic susceptibilities. © 1989 The American Physical Society
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Last time updated on 25/12/2021