Magnetic properties of Ce{sup 3+} in Pb{sub 1{minus}x}Ce{sub x}Se: Kondo and crystal-field effect
- Groupe dEtude des Semiconducteurs URA 357, Universite Montpellier II, Place Eugene Bataillon, 34095 Montpellier Cedex 5 (France)
- Department of Physic, Concordia University, 1455 de Maisonneuve Boulevard West, Montreal, Quebec, H3G 1M8 (CANADA)
- Laboratoire Louis Neel, Avenue des Martyres, BP 166X, 38042 Grenoble Cedex 9 (France)
- Institute of Physics, Polish Academy of Sciences, Pl. 02-668, Warsaw (Poland)
Electron paramagnetic resonance (EPR) experiments were performed on a Pb{sub 1{minus}x}Ce{sub x}Se crystal at liquid-helium temperatures and show very clearly that the doublet {Gamma}{sub 7} is the ground state for cerium ions. The cubic symmetry is shown and the effective Land{acute e} factor for the Ce{sup 3+} is determined to be 1.354{plus_minus}0.003. An orbital reduction factor is introduced to explain the g experimental value. High-field magnetization results are in good agreement with the EPR results. The nominal Ce composition in PbSe deduced from saturation of the magnetization, x=0.0405{plus_minus}0.0003, is very closed to the value determined by microprobe analysis (x=0.04). At 1.5 K, an antiferromagnetic interaction between the nearest-neighbor cerium atoms is found, J{sub ex}/k{sub B}={minus}0.715thinspK. The low-field magnetic-susceptibility results show that the magnetic moment of cerium impurities is strongly temperature dependent, explained by the presence of the crystal-field effect and the Kondo effect. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 632606
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 56, Issue 13; Other Information: PBD: Oct 1997
- Country of Publication:
- United States
- Language:
- English
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