High-field magnetization and magnetic phase transition in CeOs2Al10

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.

4 pages, 4 figures, to appear in Phys. Rev. B, Rapid Commun

References in corpus (7)

• Novel phase transition and the pressure effect in YbFe2Al10-type CeT2Al10 (T=Fe, Ru, Os)
• Long-range magnetic order in CeRu2Al10 evidenced by muSR and neutron diffraction
• Structural Modification and Metamagnetic Anomaly in the Ordered State of CeOs2Al10
• Possible Long-Range Order with Singlet Ground State in CeRu2Al10
• Long-range order and low-energy magnetic excitations in CeRu2Al10
• Electronic-Structure-Driven Magnetic Ordering in a Kondo Semiconductor CeOs2Al10
• Magnetization and Magnetoresistance of CeRu2Al10 under High Magnetic Fields along c-Axis

Cited by in corpus (11)

• Anisotropic spin-dynamics in the Kondo semiconductor CeRu2Al10
• Change of magnetic ground state by light electron-doping in CeOs2Al10
• Magnetic instability induced by Rh-doping in Kondo semiconductor CeRu${}_2$Al${}_{10}$
• Electronic Structures of CeM2Al10 (M = Fe, Ru, and Os) Studied by Soft X-ray Resonant and High-Resolution Photoemission Spectroscopies
• Field tuned critical fluctuations in YFe2Al10: Evidence from magnetization, 27Al (NMR, NQR) investigations
• Quantitative study of valence and configuration interaction parameters of the Kondo semiconductors CeM2Al10 (M = Ru, Os and Fe) by means of bulk-sensitive hard x-ray photoelectron spectroscopy
• Detailed neutron diffraction study of magnetic order in NdFe${}_2$Al${}_{10}$
• Incommensurate-Commensurate Magnetic Phase Transition in SmRu${}_2$Al${}_{10}$
• Temperature-Dependent Cycloidal Magnetic Structure in GdRu${}_2$Al${}_{10}$ Studied by Resonant X-ray Diffraction
• Anisotropic Magnetic Response in Kondo Lattice with Antiferromagnetic Order
• Effect of Nd and Rh substitution on the spin dynamics of Kondo insulator CeFe2Al10