muSR investigation of CeCo4B

The preliminary results of our zero-field muon spin relaxation (muSR) experiments on a polycrystalline CeCo4B sample, at ambient pressure are reported. The onset of the magnetic transition at TC=293K was evidenced by the critical-like behavior of the muSR rate above the transition temperature and th...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 2006-03, Vol.374-375, p.188-191
Main Authors: Tetean, Romulus, Andreica, Daniel, Deac, Iosif G, Burzo, Emil, Chioncel, Liviu, Amato, Alex
Format: Article
Language:English
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Summary:The preliminary results of our zero-field muon spin relaxation (muSR) experiments on a polycrystalline CeCo4B sample, at ambient pressure are reported. The onset of the magnetic transition at TC=293K was evidenced by the critical-like behavior of the muSR rate above the transition temperature and the occurrence of an oscillating component in the muSR signal below TC. The frequency corresponding to the oscillating signal has a maximum around 150K then it splits into two components below 120K, the temperature (Tt) at which an isostructural transition was reported in the literature. Magnetic measurements in the temperature range of 4.2-850K and external magnetic fields up to 9T were also performed to characterize the bulk magnetic properties of CeCo4B, while from band structure calculations we were able to compute the values of the Ce and Co magnetic moments. We found arguments that at zero applied pressure the magnetic ordering in CeCo4B is ferrimagnetic and that the transition at Tt is accompanied by a reorientation of a sublattice magnetization.
ISSN:0921-4526
DOI:10.1016/j.physb.2005.11.051