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Сибирский государственный университет
науки и технологий имени академика М.Ф. Решетнева

Сибирский аэрокосмический журнал
ISSN 2712-8970 (Print) ISSN 2782-5760 (on-line)

Сведения об образовательной организации

UDK 539.21:537.86
MAGNETOCAPACITIVE EFFECTS IN SOLID SOLUTIONS YbxMn1-xS
S. S. Aplesnin, A. M. Kharkov
Reshetnev Siberian State Aerospace University 31, Krasnoyarsky Rabochy Av., Krasnoyarsk, 660037, Russian Federation E-mail: khark.anton@mail.ru
The paper describes the materials on the basis of solid solutions YbxMn1-xS, which could be potentially used as sen-sors, sensor devices, read-write information. Mechanisms of magneto-electric effects were considered and the mecha-nism of magnetoelectric coupling at room temperatures in the absence of spin order was clarified. The optimal condi-tions for the occurrence of magnetoelectric effect on temperature and concentration are found. The results of measure-ments of dielectric permeability and dielectric loss tangent for several frequencies in the temperature range 80 K < T < 400 K for composition YbxMn1-xS, x = 0.05 and x = 0.1, without a field and in magnetic field 0.8 T were presented. The magnetic permeability of solid solutions YbxMn1-xS from the measurements of inductance of the solenoid with sample was determined. The magnetic permeability by cooling the sample in zero magnetic field and in the field of 0.25 T was measured. The shift of maximum in the temperature dependence of magnetic permeability in the vicinity of transition to the magnetically ordered state to high temperature versus frequency was found. Quality factor decreasing when heated and a maximum at a frequency of 10 kHz, and a minimum at a frequency of 50 kHz in the vicinity of Neel temperature was established. Relaxation time depends on the temperature according to the power law in the paramagnetic region. The observed anomalies are explained by the dynamic of the electron orbital magnetic moments. Magnetocapacitance effect in YbxMn1-xS with x = 0.05 and x = 0.1 at temperatures above room temperature was found. Changes in sign of magnetocapacitance in the vicinity of 200 K for x = 0.05 was determined. Magnetocapacitive effects are explained in the model of the orbital ordering of electrons. Change in sign of magnetocapacitance on temperature is attributed to the formation of magnetic and orbital ordering at different temperatures
Keywords: magnetocapacitance, dielectric permeability, inductance, quality factor, dielectric loss.
References

References

 

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Aplesnin Sergey Stepanovich – Dr. Sc., Professor, Head of Physics Dept., Reshetnev Siberian State Aerospace University. Е-mail: aplesnin@sibsau.ru.

Kharkov Anton Mikhailovich – Cand. Sc., Senior lecturer, Physics Dept., Reshetnev Siberian State Aerospace University. E-mail: khark.anton@mail.ru.