Versatile helimagnetic phases under magnetic fields in cubic perovskite SrFeO3

TL;DR

This study reveals multiple helimagnetic phases in cubic SrFeO3 under high magnetic fields, highlighting complex spin textures and an unconventional anomalous Hall effect linked to noncoplanar spin arrangements.

Contribution

It uncovers a variety of helimagnetic phases and identifies a potential long-period noncoplanar spin texture in SrFeO3 under magnetic fields, expanding understanding of spin textures in cubic perovskites.

Findings

At least five distinct helimagnetic phases identified.

Unconventional anomalous Hall effect observed near multicritical point.

Possible long-period noncoplanar spin texture with scalar spin chirality.

Abstract

A helical spin texture is of great current interest for a host of novel spin-dependent transport phenomena. We report a rich variety of nontrivial, helimagnetic phases in the simple cubic perovskite SrFeO3 under magnetic fields up to 42 T. Magnetic and resistivity measurements revealed that the proper-screw spin phase proposed for SrFeO3 can be subdivided into at least five kinds of ordered phases. Near the multicritical point, an unconventional anomalous Hall effect was found to show up and was interpreted as due to a possible long-period noncoplanar spin texture with scalar spin chirality.