Electron Spin Resonance of the ferromagnetic Kondo lattice CeRuPO

Details Electron Spin Resonance of the ferromagnetic Kondo lattice CeRuPO Electron Spin Resonance of the ferromagnetic Kondo lattice CeRuPO

2010-09-21

arxiv.org/abs/1009.4108v1

J. Phys.: Condens. Matter 22, 435603 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

This is an article accepted for publication in Journal of Physics: Condensed Matter

Scientific paper

10.1088/0953-8984/22/43/435603

The spin dynamics of the ferromagnetic Kondo lattice CeRuPO is investigated by Electron Spin Resonance (ESR) at microwave frequencies of 1, 9.4, and 34~GHz. The measured resonance can be ascribed to a rarely observed bulk Ce3+ resonance in a metallic Ce compound and can be followed below the ferromagnetic transition temperature Tc=14 K. At T>Tc the interplay between the RKKY-exchange interaction and the crystal electric field anisotropy determines the ESR parameters. Near Tc the spin relaxation rate is influenced by the critical fluctuations of the order parameter.

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