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Title: Electronic properties of Ce(Cu,Ga){sub 2}

Abstract

Ce(Cu{sub 1{minus}x}Ga{sub x}){sub 2} compounds with x = 0.0, 0.2,0.4,0.6, 0.75 and 1.0 were prepared and found to crystallize in the orthorhombic CeCu{sub 2} structure up to the composition x = 0.6, whereas for higher Ga content the hexagonal AlB{sub 2} structure is formed. The authors report on specific-heat, electrical-resistivity and magnetic-susceptibility measurements. Furthermore, the specific heat was measured in magnetic fields up to 5 T and the development of the magnetic moments and the magnetocrystalline anisotropy were studied measuring the high-field magnetization in magnetic fields up to 35 T. For CeCu{sub 2}-based compounds, the high-field magnetization results reveal a decrease of the ordered moment with increasing Ga content, which can be understood in terms of an increased 4f-ligand hybridization. The strong magnetocrystalline anisotropy observed in all samples changes from uniaxial type for x {<=} 0.2 to multiaxial type for x > 0.2. Specific-heat measurements reveal the temperatures of magnetic ordering first to decrease from 3.5 K for CeCu{sub 2} to a temperature below 1.3 K for CeCu{sub 1.6}Ga{sub 0.4} and then to increase again to 2.1 K for CeCu{sub 0.8}Ga{sub 1.2}. A development of Kondo-like behavior was observed in the electrical resistivity.

Authors:
; ;  [1]; ; ; ;  [2];  [3];  [4]
  1. Univ. of Amsterdam (Netherlands). Van der Waals-Zeeman Lab.
  2. Chinese Academy of Sciences, Beijing (China). Inst. of Physics
  3. Charles Univ., Ke Karlovu (Czech Republic). Inst. for Metal Physics
  4. Slovak Academy of Sciences, Kosice (Slovakia). Inst. of Physics
Publication Date:
OSTI Identifier:
40269
Report Number(s):
CONF-930860-
Journal ID: IEMGAQ; ISSN 0018-9464; TRN: IM9520%%464
Resource Type:
Journal Article
Journal Name:
IEEE Transactions on Magnetics
Additional Journal Information:
Journal Volume: 30; Journal Issue: 2Pt2; Conference: EMMA `93: 5th European magnetic materials and applications conference, Kosice (Slovakia), 24-27 Aug 1993; Other Information: PBD: Mar 1994
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CERIUM ALLOYS; PHYSICAL PROPERTIES; COPPER ALLOYS; GALLIUM ALLOYS; INTERMETALLIC COMPOUNDS; CRYSTAL STRUCTURE; KONDO EFFECT; EXPERIMENTAL DATA

Citation Formats

Nakotte, H., Prokes, K., Boer, F.R. de, Kuang Jianping, Cui Huijin, Li Jingyuan, Yang Fuming, Sechovsky, V., and Mihalik, M. Electronic properties of Ce(Cu,Ga){sub 2}. United States: N. p., 1994. Web. doi:10.1109/20.312230.
Nakotte, H., Prokes, K., Boer, F.R. de, Kuang Jianping, Cui Huijin, Li Jingyuan, Yang Fuming, Sechovsky, V., & Mihalik, M. Electronic properties of Ce(Cu,Ga){sub 2}. United States. doi:10.1109/20.312230.
Nakotte, H., Prokes, K., Boer, F.R. de, Kuang Jianping, Cui Huijin, Li Jingyuan, Yang Fuming, Sechovsky, V., and Mihalik, M. Tue . "Electronic properties of Ce(Cu,Ga){sub 2}". United States. doi:10.1109/20.312230.
@article{osti_40269,
title = {Electronic properties of Ce(Cu,Ga){sub 2}},
author = {Nakotte, H. and Prokes, K. and Boer, F.R. de and Kuang Jianping and Cui Huijin and Li Jingyuan and Yang Fuming and Sechovsky, V. and Mihalik, M.},
abstractNote = {Ce(Cu{sub 1{minus}x}Ga{sub x}){sub 2} compounds with x = 0.0, 0.2,0.4,0.6, 0.75 and 1.0 were prepared and found to crystallize in the orthorhombic CeCu{sub 2} structure up to the composition x = 0.6, whereas for higher Ga content the hexagonal AlB{sub 2} structure is formed. The authors report on specific-heat, electrical-resistivity and magnetic-susceptibility measurements. Furthermore, the specific heat was measured in magnetic fields up to 5 T and the development of the magnetic moments and the magnetocrystalline anisotropy were studied measuring the high-field magnetization in magnetic fields up to 35 T. For CeCu{sub 2}-based compounds, the high-field magnetization results reveal a decrease of the ordered moment with increasing Ga content, which can be understood in terms of an increased 4f-ligand hybridization. The strong magnetocrystalline anisotropy observed in all samples changes from uniaxial type for x {<=} 0.2 to multiaxial type for x > 0.2. Specific-heat measurements reveal the temperatures of magnetic ordering first to decrease from 3.5 K for CeCu{sub 2} to a temperature below 1.3 K for CeCu{sub 1.6}Ga{sub 0.4} and then to increase again to 2.1 K for CeCu{sub 0.8}Ga{sub 1.2}. A development of Kondo-like behavior was observed in the electrical resistivity.},
doi = {10.1109/20.312230},
journal = {IEEE Transactions on Magnetics},
number = 2Pt2,
volume = 30,
place = {United States},
year = {1994},
month = {3}
}