Magnetic susceptibility studies on Pr{sub {ital x}}Y{sub 1{minus}{ital x}}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} single crystals in the insulating regime
- Materials Science Program, Department of Physics, University of Nebraska at Omaha, Omaha, Nebraska 68182-0266 (United States)
- Clarendon Laboratory, University of Oxford, Oxford OX1 3PU (United Kingdom)
- Institut fuer Festkoerperphysik, Technische Universitaet Graz, Petersgasse 16, 8010 Graz (Austria)
We have performed magnetic-susceptibility measurements on single crystals of Pr{sub {ital x}}Y{sub 1{minus}{ital x}}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} with 0.4{le}{ital x}{le}1, in the temperature range 5--300 K. The susceptibility at low temperature is nonlinear, however, above 100 K it is found to follow the Curie law. The values of the effective moment deduced is attributed to Pr in a 3+ valency state. This interpretation is consistent with the theoretical models that take into account the crystal-field effects on the trivalent Pr. The magnetic anisotropy studies indicate that the susceptibility along the {ital c} axis is greater than that along the {ital ab} plane in the entire temperature region 5--300 K. This observation favors the crystal-field schemes that have a ground state of {Gamma}{sub 4} or {Gamma}{sub 2} symmetry.
- OSTI ID:
- 76413
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 52, Issue 1; Other Information: PBD: 1 Jul 1995
- Country of Publication:
- United States
- Language:
- English
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