Precursor phenomena at the magnetic ordering of the cubic helimagnet FeGe

H. Wilhelm; M. Baenitz; M. Schmidt; U. K. Roessler; A. A. Leonov; A. N. Bogdanov

doi:10.1103/PhysRevLett.107.127203

Precursor phenomena at the magnetic ordering of the cubic helimagnet FeGe

Strongly Correlated Electrons 2011-11-10 v1

Authors: H. Wilhelm , M. Baenitz , M. Schmidt , U. K. Roessler , A. A. Leonov , A. N. Bogdanov

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Abstract

We report on detailed magnetic measurements on the cubic helimagnet FeGe in external magnetic fields and temperatures near the onset of long-range magnetic order at $T_C= 278.2(3)$ K. Precursor phenomena display a complex succession of temperature-driven crossovers and phase transitions in the vicinity of $T_C$ . The A-phase region, present below $T_C$ and fields $H<0.5$ kOe, is split in several pockets. Relying on a modified phenomenological theory for chiral magnets, the main part of the A-phase could indicate the existence of a $+\pi$ Skyrmion lattice, the adjacent A $_2$ pocket, however, appears to be related to helicoids propagating in directions perpendicular to the applied field.

Keywords

cubic helimagnet FeGe precursor phenomena magnetic ordering Skyrmion lattice chiral magnets

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@article{arxiv.1101.0674,
  title  = {Precursor phenomena at the magnetic ordering of the cubic helimagnet FeGe},
  author = {H. Wilhelm and M. Baenitz and M. Schmidt and U. K. Roessler and A. A. Leonov and A. N. Bogdanov},
  journal= {arXiv preprint arXiv:1101.0674},
  year   = {2011}
}

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5 pages, 4 figures

Precursor phenomena at the magnetic ordering of the cubic helimagnet FeGe

Abstract

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