1.2k citations · 1.7k across the 29 of their papers we have counts for
19 papers · 1 filter
Linear and isotropic magnetoresistance of CoFeSi at x=0.2; 0.4; 0.65
A. E. Petrova, S. Yu. Gavrilkin, V. A. Stepanov +3
We studied the magnetoresistance (MR) of well-characterized samples of CoFeSi at x=0.2, 0.4, and 0.65 at temperatures between 1.8 and 100~K and magnetic fields of 9~T.…
On the Topological Features of the Helical Phase Transition in MnSi
S. M. Stishov, A. E. Petrova, A. M. Belemuk
Many decades of study have revealed very unusual properties of the helical phase transition in MnSi. This situation is briefly described and illustrated in the present note. As one…
Quantum criticality features in the Co doped MnSi
A. E. Petrova, A. M. Belemuk, S. M. Stishov
The mysterious universal line revealing an independence of spin fluctuation contributions to the heat capacity of (Mn,Co)Si on impurity contents and its nature is discovered. This…
Magnetoresistance and Kohler rule in the topological chiral semimetals CoSi
A. E. Petrova, O. A. Sobolevskii, S. M. Stishov
The transverse and longitudinal magnetoresistance (MR) of two samples of the topological chiral semimetal CoSi with different RRR was studied. It is shown that the Kohler rule work…
Physical properties of MnSi at extreme doping with Co: Quantum criticality
A. E. Petrova, S. Yu. Gavrilkin, A. Yu. Tsvetkov +4
The samples of (MnCo)Si with and were grown and their physical properties: magnetization and magnetic susceptibility, resistivity and heat capacity we…
Physical properties of (Mn,Co)Si
A. E. Petrova, S. Y. Gavrilkin, G. V. Rybalchenko +2
We have grown and characterized three samples of Co doped MnSi and studied their physical properties (magnetization and magnetic susceptibility, heat capacity and electrical resist…
Physical properties of (Mn 0.85 Fe 0.15) Si along the critical trajectory
A. E. Petrova, Dirk Menzel, S. M. Stishov
We report results of studying the magnetization, specific heat and thermal expansion of a single crystal with nominal composition Mn 0.85 Fe 0.15 Si . We found no thermodynamic evi…
The Vollhardt crossing point at high magnetic field
A. E. Petrova, S. M. Stishov
Direct measurements of the Vollhardt crossing point coordinates were performed making use data of dilatometric and ultrasound experiments on MnSi. As is shown the crossing points a…
Monte Carlo modeling the phase diagram of magnets with the Dzyaloshinskii - Moriya interaction
A. M. Belemuk, S. M. Stishov
We use classical Monte Carlo calculations to model the high-pressure behavior of the phase transition in the helical magnets. We vary values of the exchange interaction constant J…
Phase transitions in chiral magnets from Monte Carlo simulations
A. M. Belemuk, S. M. Stishov
Motivated by the unusual temperature dependence of the specific heat in MnSi, comprising a combination of a sharp first-order feature accompanied by a broad hump, we study the exte…
Thermal expansion and magneto-volume studies of the itinerant helical magnet MnSi
A. E. Petrova, S. M. Stishov
Thermal expansion and forced magnetostriction of MnSi were measured as a function of temperature down to 5 K and magnetic field to 3 T. The small length (volume) discontinuity at t…
Inexhaustible physics of the helical magnet MnSi: field evolution of the magnetic phase transition inferred from ultrasound studies
A. E. Petrova, S. M. Stishov
The longitudinal and transverse ultrasound speeds and attenuation were measured in a MnSi single crystal in the temperature range of 2 - 40 K and magnetic fields to 7 Tesla. The ma…
On the phase diagram of the itinerant helimagnet MnSi: does MnSi become quantum critical ?
Alla E. Petrova, Sergei M. Stishov
We performed a series of resistivity measurements of a MnSi single crystal at high pressures, created by a piston-cylinder device with a liquid pressure medium. The form of the res…
Comment on "Nature of the high-pressure tricritical point in MnSi"
Sergei M. Stishov
It is argued that M. Otero-Leal et al. [PRB 79, 060401 (2009) [1] wrongly identified the second order term of the Arrott equation with the coefficient at the quartic term of the La…
Ultrasonic studies of the magnetic phase transition in MnSi
A. E. Petrova, S. M. Stishov
Measurements of the sound velocities in a single crystal of MnSi were performed in the temperature range 4-150 K. Elastic constants, controlling propagation of longitudinal waves r…
High Pressure studies of the magnetic phase transition in MnSi: revisited
Alla E. Petrova, Vladimir N. Krasnorussky, T. A. Lograsso +1
New measurements of AC magnetic susceptibility and DC resistivity of a high quality single crystal MnSi were carried out at high pressure making use of helium as a pressure medium.…
On the nature of the phase transition in the itinerant helimagnet MnSi
S. M. Stishov, A. E. Petrova, S. Khasanov +5
A careful study of thermodynamic and transport properties of a high quality single crystal of MnSi at ambient pressure suggests that its transition to a helical magnetic state near…
Peculiar behavior of the electrical resistivity of MnSi at the ferromagnetic phase transition
Alla E. Petrova, Eric Bauer, V. Krasnorussky +1
The electrical resistivity of a single crystal of MnSi was measured across its ferromagnetic phase transition line at ambient and high pressures. Sharp peaks of the temperature coe…
Tricritical behavior in MnSi at nearly hydrostatic pressure
Alla E. Petrova, Vladimir Krasnorussky, John Sarrao +1
AC magnetic susceptibility of a single crystal of MnSi was measured along the ferromagnetic phase-transition line up to a pressure of 0.8 GPa created by compressed helium. The resu…