Eu/sub 2/CuO/sub 4/: An anisotropic Van Vleck paramagnet

Journal Article · Wed Feb 01 00:00:00 EST 1989 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.39.2661· OSTI ID:6555038

Tovar, M; Rao, D; Barnett, J; Oseroff, S B; Thompson, J D; Cheong, S; Fisk, Z; Vier, D C; Schultz, S

Magnetic susceptibility measurements have shown anisotropic Van Vleck paramagnetism in Eu/sub 2/CuO/sub 4/ single crystals. This behavior is associated with the singlet ground state (/sup 7/F/sub 0/) of Eu/sup 3+/ ions, and the measured anisotropy is related to a crystal-field splitting of the excited multiplets (/sup 7/F/sub J/). From the experimental data at low temperatures (Tapprox. <50 K) a crystal-field parameter A/sub 2//sup 0/ = -93(5) cm/sup -1/ and a spin-orbit coupling constant zeta = 303(15) cm/sup -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.

• Research Organization: San Diego State University, San Diego, California 92182
• OSTI ID: 6555038
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Vol. 39:4
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
EUROPIUM COMPOUNDS
MAGNETIC SUSCEPTIBILITY
ANISOTROPY
CORRELATIONS
CRYSTAL FIELD
CUPRATES
ELECTRONIC STRUCTURE
MONOCRYSTALS
PARAMAGNETISM
TEMPERATURE DEPENDENCE
COPPER COMPOUNDS
CRYSTALS
MAGNETIC PROPERTIES
MAGNETISM
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360104* - Metals &amp; Alloys- Physical Properties