Magnetization of Mn_( 1–x) Fe_x Si in High Magnetic Fields up to 50 T: Possible Evidence of a Field-Induced Griffiths Phase

Авторы:

S. V. Demishev, A. N. Samarin, J. Huang, V. V. Glushkov, I. I. Lobanova, N. E. Sluchanko, N. M. Chubova, V. A. Dyadkin, S. V. Grigoriev, M. Yu. Kagan, J. Vanacken, and V. V. Moshchalkov

Авторы из ОИКС:

С. В. Григорьев
В. А. Дядькин

Год публикации:

2016

Журнал:

JETP Letters N 2 vol. 104 116-123

Ссылка:

http://link.springer.com/article/10.1134/S0021364016140022

DOI:

DOI: 10.1134/S0021364016140022

Абстракт:

Magnetic properties of single crystals of Mn1−xFexSi 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 Mn1−xFexSi in the paramagnetic phase follows power law M(B) ~ Bα with the exponents α ∼ 0.33 − 0.5, which starts above characteristic fields Bc ∼ 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 5T 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.