Electronic states in antiferromagnet UCd11 and reference compound ThCd11: studied by the de Haas–van Alphen effect. Issue 3 (19th February 2013)

• Record Type: Journal Article
• Authors: Hirose, Yusuke; Miura, Yasunao; Tsutsumi, Hiroki; Yoshiuchi, Shingo; Ohya, Masahiro; Sugiyama, Kiyohiro; Takeuchi, Tetsuya; Yamagami, Hiroshi; Yamamoto, Etsuji; Haga, Yoshinori; Settai, Rikio; Ōnuki, Yoshichika
• Is Part Of: Physica status solidi. Volume 250:Issue 3(2013:Mar.)
• Page Start: 642
• Page End: 645
• Publication Date: 2013-02-19
• Subjects: Solid state physics -- Periodicals; Solids -- Periodicals; Atomic structure -- Periodicals; 530.41
• DOI: 10.1002/pssb.201200765
• Languages: English
• ISSNs: 0370-1972

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>We carried out the de Haas–van Alphen (dHvA) experiment for an antiferromagnet UCd₁₁ and its non‐5f reference compound ThCd₁₁ to clarify the Fermi surface properties and the true electronic specific‐heat coefficient <italic>γ</italic> of UCd₁₁. We observed dHvA signals of both compounds and compared the experimental results with the result of theoretical band calculations. The Fermi surfaces of both compounds are found to be small and closed. The cyclotron masses obtained from the dHvA data of UCd₁₁ are compared with those of reference compounds ThCd₁₁, NpCd₁₁, and LaCd₁₁, and the <italic>γ</italic> value of UCd₁₁ is estimated to be about 100 mJ K⁻² mol⁻¹, which is much smaller than the 840 mJ K⁻² mol⁻¹ in the previous reports. It is concluded that this large value is mainly not due to heavy quasiparticles but due to the magnetic contribution to the specific heat.</p> </abstract>