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arXiv · 1105.2151

High-field magnetization and magnetic phase transition in CeOs2Al10

Akihiro Kondo·Junfeng Wang·Koichi Kindo·Yuta Ogane·Yukihiro Kawamura·Sakiyo Tanimoto·Takashi Nishioka·Daiki Tanaka·Hiroshi Tanida·Masafumi Sera
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Abstract

We have studied the magnetization of CeOs2Al10 in high magnetic fields up to 55 T for H // a and constructed the magnetic phase diagram for H // a. The magnetization curve shows a concave H dependence below T_max \sim40 K which is higher than the transition temperature T_0 \sim29 K. The magnetic susceptibility along the a-axis shows a smooth and continuous decrease down to \sim20 K below T_max \sim40 K without showing an anomaly at T_0. From these two results, a Kondo singlet is formed below T_max and coexists with the antiferro magnetic order below T_0. We also propose that the larger suppression of the spin degrees of freedom along the a-axis than along the c-axis below T_max is associated with the origin of the antiferro magnetic component.

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Akihiro Kondo, Junfeng Wang, Koichi Kindo, Yuta Ogane, Yukihiro Kawamura, Sakiyo Tanimoto, Takashi Nishioka, Daiki Tanaka, Hiroshi Tanida, Masafumi Sera. 2011-05-11. High-field magnetization and magnetic phase transition in CeOs2Al10. https://doi.org/10.1103/physrevb.83.180415

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