NMR study of magnetic structure and hyperfine interactions in the binary helimagnet FeP

Gippius, A. A.; Ткачев, А. В.; Zhurenko, S. V.; Mahajan, A. V.; Büttgen, N.; Schaedler, Martina; Chernyavskii, I. O.; Morozov, Igor; Aswartham, Saicharan; Büchner, B.; Moskvin, A. S.

doi:10.1103/physrevb.102.214416

Cited by 1 publication

(2 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: B Magnetic Structure Of Fepmentioning

confidence: 99%

“…The details of the magnetic structure, including the value of the angle α, were used in a number of studies to interpret the results of 57 Fe Mössbauer spectroscopy [30,31], 31 P NMR spectroscopy [31,32], and the de Haas-van Alphen effect [33] measurements. Particularly, the authors of [32] showed that all the obtained 31 P NMR spectra can be well reproduced theoretically when the parameter α = 4 • of the magnetic structure is taken into account, which further supports the neutron diffraction results [20]. The canting angle might play an important role in the unusual magnetotransport properties of FeP [34], though the relation between the observed strongly anisotropic magnetoresistance and the distortions of the magnetic structure is rather complex and remains to be understood.…”

Section: B Magnetic Structure Of Fepmentioning

confidence: 99%

See 1 more Smart Citation

Frustration model and spin excitations in the helimagnet FeP

et al. 2022

Self Cite

View full text Add to dashboard Cite

The metallic compound FeP belongs to the class of materials that feature a complex noncollinear spin order driven by magnetic frustration. While its double-helix magnetic structure with a period λ s ≈ 5c, where c is the lattice constant, was previously well determined, the relevant spin-spin interactions that lead to that ground state remain unknown. By performing extensive inelastic neutron scattering measurements, we obtained the spin-excitation spectra in a large part of the momentum-energy space. The spectra show that the magnons are gapped with a gap energy of ∼5 meV. Despite the 3D crystal structure, the magnon modes display strongly anisotropic dispersions, revealing a quasi-one-dimensional character of the magnetic interactions in FeP. The physics of the material, however, is not determined by the dominating exchange, which is ferromagnetic. Instead, the weaker two-dimensional antiferromagnetic interactions between the rigid ferromagnetic spin chains drive the magnetic frustration. Using linear spin-wave theory, we were able to construct an effective Heisenberg Hamiltonian with an anisotropy term capable of reproducing the observed spectra. This enabled us to quantify the exchange interactions in FeP and determine the mechanism of its magnetic frustration.

show abstract