1. Role of Hyperfine Coupling in Magnetic and Quadrupolar Ordering ofPr3Pd20Si6
- Author
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Hideaki Kitazawa, C. F. Miclea, K. Mitsumoto, Manuel Brando, L. Steinke, Yuichi Nemoto, Franziska Weickert, Andreas Dönni, Terutaka Goto, Peter Thalmeier, and Mitsuhiro Akatsu
- Subjects
Physics ,Hyperfine coupling ,Condensed matter physics ,Specific heat ,Degrees of freedom (physics and chemistry) ,General Physics and Astronomy ,Antiferromagnetism ,Condensed Matter::Strongly Correlated Electrons ,Ternary operation ,Ground state ,Single crystal ,Hyperfine structure - Abstract
We study the ternary clathrate ${\mathrm{Pr}}_{3}{\mathrm{Pd}}_{20}{\mathrm{Si}}_{6}$ in specific heat and ac susceptibility measurements on a high-quality single crystal, distinguishing antiferromagnetic and antiferroquadrupolar ordering, as well as a hitherto unknown magnetic low-temperature transition. The specific heat shows the direct involvement of nuclear spin degrees of freedom in the antiferromagnetic ordering, which is well supported by our calculation of the hyperfine level scheme without adjustable parameters. ${\mathrm{Pr}}_{3}{\mathrm{Pd}}_{20}{\mathrm{Si}}_{6}$ is, therefore, one of the rare materials where the nuclear moments are involved in the formation of the magnetic ground state.
- Published
- 2013