Field-induced vortex-like textures as a probe of the critical line in reentrant spin glasses.

ABSTRACT: We study the evolution of the low-temperature field-induced magnetic defects observed under an applied magnetic field in a series of frustrated amorphous ferromagnets (Fe[Formula: see text]Mn[Formula: see text])[Formula: see text]P[Formula: see text]B[Formula: see text]Al[Formula: see text] ("a-Fe[Formula: see text]Mn[Formula: see text]"). Combining small-angle neutron scattering and Monte Carlo simulations, we show that the morphology of these defects resemble that of quasi-bidimensional spin vortices. They are observed in the so-called "reentrant" spin-glass (RSG) phase, up to the critical concentration [Formula: see text] which separates the RSG and "true" spin glass (SG) within the low temperature part of the magnetic phase diagram of a-Fe_1-xMn_x. These textures sy

SUBMITTER: Martin N 

PROVIDER: S-EPMC8531314 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature