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The optical and magneto-optical properties of single crystals of YFe{sub 2}, CeFe{sub 2}, and Ce(Fe{sub 1-x}Co{sub x}){sub 2} (x{approx_equal}0.1) were measured between 1.4 and 5.0 eV using a rotating-analyzer ellipsometer and a normal-incidence polar Kerr spectrometer. The electronic structures and optical properties of YFe{sub 2} and CeFe{sub 2} were calculated using the tight-binding linear muffin-tin orbital method in the atomic-sphere approximation. For YFe{sub 2} the calculations reproduce the experimental spectra. Alloying CeFe{sub 2} with small amounts of Co leads to an electronic instability which is evidenced by a low-temperature antiferromagnetic (AF) phase. The Kerr effect was measured in the AF and field-induced ferromagnetic (FM) regime. A remarkably large Kerr rotation was measured even in the AF state (up to -1 degree sign ). The phase transition from AF to FM order was observed in the Kerr rotation spectra at 5 and 50 K at photon energies of 1.8 and 4.0 eV. (c) 2000 The American Physical Society.
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| Authors: |
Lange, R. J. [Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)];
Fisher, I. R. [Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)];
Canfield, P. C. [Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)];
Antropov, V. P. [Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)];
Lee, S. J. [Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)];
Harmon, B. N. [Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)];
Lynch, D. W. [Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)]
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| Publication Date: | 2000 Sep 15 |
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| OSTI Identifier: | 20217697 |
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| Resource Type: | Journal Article |
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| Resource Relation: | Journal Name: Physical Review. B, Condensed Matter and Materials Physics; Journal Volume: 62; Journal Issue: 11; Other Information: PBD: 15 Sep 2000 |
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| Country of Publication: | United States |
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| Language: | English |
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| Format: | Size: page(s) 7084-7092 |
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| Other Number(s): | Journal ID: ISSN 1098-0121; TRN: US00Z2760 |
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| Subject: | 36 MATERIALS SCIENCE; CERIUM ALLOYS; IRON ALLOYS; COBALT ALLOYS; MAGNETO-OPTICAL EFFECTS; MONOCRYSTALS; KERR EFFECT; MUFFIN-TIN POTENTIAL; ELECTRONIC STRUCTURE; YTTRIUM ALLOYS; PHASE TRANSFORMATIONS; EXPERIMENTAL DATA; THEORETICAL DATA |
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| Update Date: | 2010 Jun 03 |
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