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Metamagnetic Behavior in Heavy Fermion Compounds UCo2Zn20 and UIr2Zn20

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, , Citation Y Hirose et al 2012 J. Phys.: Conf. Ser. 391 012021 DOI 10.1088/1742-6596/391/1/012021

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1 Graduate School of Science, Osaka University, Toyonaka Osaka 560-0043, Japan

2 Low Temperature Center, Osaka University, Toyonaka, Osaka 560-0043, Japan

3 Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan

4 KYOKUGEN, Osaka University, Toyonaka, Osaka 560-8531, Japan

5 ISSP, University of Tokyo, Kashiwanoha, 5-1-5, Kashiwa, Chiba 277-8581, Japan

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1742-6596/391/1/012021

Abstract

The metamagnetic behavior, which is typical in heavy fermion compounds, is observed in UCo2Zn20 and UIr2Zn20 at Hm = 80 and 20 kOe, respectively. Reflecting the metamagnetic behavior, the magnetoresistance is suppressed in magnetic fields larger than Hm, and the corresponding A-value of a Fermi liquid relation in the electrical resistivity ρ = ρ0+AT2 indicates a peak at around Hm. Pressure suppresses this behavior in UIr2Zn20.

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10.1088/1742-6596/391/1/012021