English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Interplay between localized and itinerant magnetism in Co-substituted FeGa3

MPS-Authors
/persons/resource/persons126528

Baenitz,  M.
Michael Baenitz, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

External Ressource
No external resources are shared
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Gippius, A. A., Verchenko, V. Y., Tkachev, A. V., Gervits, N. E., Lue, C. S., Tsirlin, A. A., et al. (2014). Interplay between localized and itinerant magnetism in Co-substituted FeGa3. Physical Review B, 89(10): 104426, pp. 1-8. doi:10.1103/PhysRevB.89.104426.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0019-1651-E
Abstract
The evolution of the electronic structure and magnetic properties with Co substitution for Fe in the solid solution Fe-1 xCoxGa3 was studied by means of ab initio band-structure calculations and nuclear spin-lattice relaxation 1/T1 of the (69),Ga-71 nuclei. The (69,71)(1/T-1) was studied as a function of temperature in a wide temperature range of 2-300 K for the concentrations x = 0.0, 0.5, and 1.0. In the parent semiconducting compound FeGa3, the temperature dependence of the (69)(1/T1) exhibits a huge maximum at about T similar to 6 K indicating the existence of in-gap states. The opposite binary compound, CoGa3, demonstrates a metallic Korringa behavior with 1/T1. T. In Fe0.5Co0.5Ga3, the relaxation is strongly enhanced due to spin fluctuations and follows 1/T1 proportional to T1/2, which is a unique feature of weakly and nearly antiferromagnetic metals. This itinerant antiferromagnetic behavior contrasts with ab initio band-structure calculations, where a ferromagnetic state with an ordered moment of 0.5 mu(B)/f.u. is predicted. The results are discussed in terms of the interplay between the localized and itinerant magnetism including in-gap states and spin fluctuations.