Open AccessОсобенности поведения ионов Mn-=SUP=-2+-=/SUP=- в 3D-дираковском полуметалле alpha-Cd-=SUB=-3-=/SUB=-As-=SUB=-2-=/SUB=- по данным ЭПР
Author(s) -
Ю.В. Горюнов,
А.Н. Натепров
Publication year - 2021
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2021.02.50463.196
Subject(s) - electron paramagnetic resonance , manganese , antiferromagnetism , condensed matter physics , magnetoresistance , polaron , impurity , europium , doping , magnetic moment , electron , chemistry , materials science , ion , physics , nuclear magnetic resonance , magnetic field , organic chemistry , quantum mechanics
The behavior of the manganese impurity in the 3D Dirac semimetal Cd3As2 has been studied by EPR and electromagnetic measurements. It was found that, in contrast to doping with europium, doping with manganese, as well as with iron, does not lead to a change in the sign of the magnetoresistance, which is almost completely suppressed at high manganese concentrations. In this case, a change in the type of the influence of the magnetic field on the contact potential is manifested. The g-factors measured in EPR coincide with the g-factor of a free electron at all temperatures, which, taking into account the fluctuation behavior of the EPR linewidth and the reduced magnetic moment on Mn2 +, indicates the formation of short-lived bound states of the Mn2 + ion and conduction electrons - antiferromagnetic polarons.