Magnetization of the Mn${}_{1-x}$Fe${}_x$Si in high magnetic field up to 50 T: possible evidence of a field-induced Griffiths phase

Abstract

Magnetic properties of single crystals of Mn${}_{1-x}$Fe${}_x$Si solid solutions with $x<0.2$ are investigated by pulsed field technique in magnetic fields up to 50 T. It is shown that magnetization of Mn${}_{1-x}$Fe${}_x$Si in the paramagnetic phase follows power law $M(B)\sim B^{\alpha }$ with the exponents $\alpha \sim 0.33-0.5$, which starts above characteristic fields $B_c\sim 1.5-7$ T depending on the sample composition and lasts up to highest used magnetic field. Analysis of magnetization data including SQUID measurements in magnetic fields below 5 T suggests that this anomalous behavior may be likely attributed to the formation of a field-induced Griffiths phase in the presence of spin-polaron effects.

to be published in JETP Letters

References in corpus (4)

• Fluctuation-induced first-order phase transition in Dzyaloshinskii-Moriya helimagnets
• Magnetic phase diagram of MnSi inferred from magnetization and ac susceptibility
• Chiral criticality in doped Mn${}_{1-y}$Fe${}_y$Si compounds
• Scrutinizing Hall effect in Mn${}_{1-x}$Fe${}_x$Si: Fermi surface evolution and hidden quantum criticality

Cited by in corpus (6)

• Electronic phase separation: recent progress in the old problem
• Magnetization and ac susceptibility study of the cubic chiral magnet Mn${}_{1-x}$Fe${}_x$Si
• Effects of anisotropy and Coulomb interactions on quantum transport in a quadruple quantum-dot structure
• Evolution of magneto-crystalline anisotropies in Mn${}_{1-x}$Fe${}_x$Si and Mn${}_{1-x}$Co${}_x$Si as inferred from small-angle neutron scattering and bulk properties
• Evolution of helimagnetic correlations in Mn${}_{1-x}$Fe${}_x$Si with doping: a small-angle neutron scattering study
• Evolution of Helimagnetic Correlations when approaching the Quantum Critical Point of Mn${}_{1-x}$Fe${}_x$Si