Inclined magnetic structures and magnetic phase diagrams for the Pb2Fe2−Mn Ge2O9 (x = 0.16) single crystal

Pankrats, A. I.; Balaev, A. D.; Skorobogatov, S.A.; Krasikov, A. A.; Kolkov, M.I.; Жарков, С. М.; Зеер, Г. М.; Pavlovskiĭ, M. S.; Balaev, D. A.

doi:10.1016/j.jmmm.2022.170021

Cited by 2 publications

(1 citation statement)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Magnetic characteristics also change significantly [21]. According to the obtained magnetic data, the antiferromagnetic vector at substitution x = 0.16 in helium temperature is directed not along axis c, as in the case of a pure crystal, but lies in plane bc at the angle of 20 • to axis b.…”

Section: Resultsmentioning

confidence: 77%

Magnetodielectric effect insingle crystals sequence of Pb-=SUB=-2-=/SUB=-Fe-=SUB=-2-x-=/SUB=-Mn-=SUB=-x-=/SUB=-Ge-=SUB=-2-=/SUB=-O-=SUB=-9-=/SUB=- (x=0-0.4)

Freydman

Pankats

Skorobogatov

et al. 2022

Physics of the Solid State

View full text Add to dashboard Cite

In this work, the magnetodielectric response have been studied in a series of single crystals of Pb2Fe2-xMnxGe2O9 with substitution x from 0 to 0.43. The research results showed that an increase in x leads to a change in the orientation of the antiferromagnetism vector in a zero magnetic field. The application of an external magnetic field leads to spin-flop and spin-reorientation magnetic transitions, which are accompanied by anomalies in the behavior of the permittivity.When Fe3+ ions are replaced by Mn3+ ions, the response of the magnetic subsystem to an external magnetic field changes, which is naturally reflected in the change in the magnetodielectric response. The permittivity changes stepwise when the magnetic subsystem passes into a state with a nonzero vector of the weakly ferromagnetic moment, or when its magnitude and orientation change due to a spin-flop transition. The latter indicates that a sharp change in polarizability is a consequence of a change in the contribution of the exchange energy, as well as the contribution of the Dzyaloshinskii-Moriya term, due to a change in the skew angle between two interacting magnetic moments. Keywords: magnetodielectric effect, phase transition, week ferromagnetism.

show abstract

Section: Resultsmentioning

confidence: 77%