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Neutron diffraction and scattering study of the weak ferromagnetism in NaFe4Sb12 skutterudite

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Leithe-Jasper,  A.
Andreas Leithe-Jasper, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Schnelle,  W.
Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Rosner,  H.
Helge Rosner, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Leithe-Jasper, A., Schnelle, W., Rosner, H., Schweika, W., & Isnard, O. (2014). Neutron diffraction and scattering study of the weak ferromagnetism in NaFe4Sb12 skutterudite. Physical Review B, 90(14): 144416, pp. 1-7. doi:10.1103/PhysRevB.90.144416.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0024-BF96-4
Abstract
A structural and magnetic investigation of NaFe4Sb12 with filled skutterudite structure is carried out by means of powder neutron diffraction and magnetization measurements in order to investigate the magnetic ground state of this compound. The existence of an ordered magnetic moment on the Fe site of approximate to 0.6 mu(B)/Fe atom is in good agreement with magnetization data. The ratio between the number of spins in the paramagnetic state and in the saturated ferromagnetic state is approximate to 1.7, indicating some degree of delocalization of the Fe magnetic moment in NaFe4Sb12. Theoretical density-functional calculations of real-space spin-density maps are performed and compared to the experimental findings of weak ferromagnetism in NaFe4Sb12 (T-C approximate to 83 K). Diffuse magnetic scattering with polarized neutrons revealed that a localized moment exists in the paramagnetic phase which decreases with increasing temperature. The results are discussed in the light of comparison with other intermetallic compounds.