Neutron scattering study of the long-range ordered state in CeRu2Al10

Abstract

Elastic and inelastic neutron scattering measurements have been performed on powder and single-crystal samples of orthorhombic CeRu2Al10. The order forming below T0 = 27 K was identified as a long-range antiferromagnetic state with the wave vector k = (1,0,0). The magnetic spectral response in the ordered phase, measured on powder, is characterized by a spin gap and a pronounced peak at 8 meV, whose Q dependence suggests a magnetic origin. Both features are suppressed when temperature is raised to T0, and a conventional relaxational behavior is observed at 40 K. This peculiar spin dynamics is discussed in connection with recent magnetization results for the same compound.

5 pages, 5 figures, International Conference on Heavy Electrons 2010 (Tokyo Metropolitan University, September 17 - 20, 2010), to be published in Journal of the Physical Society of Japan. Typo corrected p. 3: "sites denoted 1 and 3" => "1 and 4"

References in corpus (4)

• 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
• Possible Long-Range Order with Singlet Ground State in CeRu2Al10
• Long-range order and low-energy magnetic excitations in CeRu2Al10

Cited by in corpus (13)

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• Another dimension: investigations of molecular magnetism using muon-spin relaxation
• muSR and inelastic neutron scattering investigations of the caged type Kondo semimetals: CeT2Al10 (T=Fe, Ru and Os)
• Change of magnetic ground state by light electron-doping in CeOs2Al10
• Competing 4f-electron dynamics in Ce(Ru1-xFex)2Al10 (x=0 to 1): magnetic ordering emerging from the Kondo semiconducting state
• Magnetic ordering with reduced cerium moments in hole-doped CeOs2Al10
• Dispersive magnetic resonance mode in the Kondo semiconductor CeFe2Al10
• Detailed neutron diffraction study of magnetic order in NdFe${}_2$Al${}_{10}$
• Anisotropic Magnetic Response in Kondo Lattice with Antiferromagnetic Order
• Uniform and Staggered electric axial moment in zigzag chain
• Effect of Nd and Rh substitution on the spin dynamics of Kondo insulator CeFe2Al10