Physical properties of 
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 at 
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Petrova, A. E.; Gavrilkin, S. Yu.; Menzel, D.; Стишов, С. М.

doi:10.1103/physrevb.100.094403

Cited by 9 publications

(8 citation statements)

References 26 publications

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“…These limitations are overcome by chemical pressure, in the form of Fe doping in Mn 1−x Fe x Si. The behaviour of this system resembles that of MnSi under pressure [28][29][30][31][32][33][34][35][36][37] and our magnetization, susceptibility and SANS investigations [28,29] led to the phase diagram shown in Fig. 1.…”

Section: Introductionsupporting

confidence: 51%

Evolution of helimagnetic correlations when approaching the quantum critical point of Mn1−xFexSi

Pappas

Leonov

Bannenberg

et al. 2021

Phys. Rev. Research

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We present a comprehensive investigation of the evolution of helimagnetic correlations in Mn1−xFexSi with increasing doping. By combining polarised neutron scattering and high resolution Neutron Spin Echo spectroscopy we investigate three samples with x=0.09, 0.11 and 0.14, i.e. with compositions on both sides of the concentration x * ∼ 0.11 where the helimagnetic Bragg peaks disappear and between x * and the quantum critical concentration xC ∼ 0.17, where TC vanishes. We find that the abrupt disappearance of the long range helical periodicity at x * , does not affect the precursor fluctuating correlations. These build up with decreasing temperature in a similar way as for the parent compound MnSi. Also the dynamics bears strong similarities to MnSi. The analysis of our results indicates that frustration, possibly due to achiral RKKY interactions, increases with increasing Fe doping. We argue that this effect explains both the expansion of the precursor phase with increasing x and the abrupt disappearance of long range helimagnetic periodicity at x * .

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Section: Introductionsupporting

confidence: 51%

Evolution of helimagnetic correlations when approaching the quantum critical point of Mn1−xFexSi

Pappas

Leonov

Bannenberg

et al. 2021

Phys. Rev. Research

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“…1 illustrates a dependence of the lattice parameters of (Mn 1−x Co x )Si on the Co content. Note that the lattice parameter of the material with x ≈ 0.15 − 0.17 reaches the corresponding value for pure MnSi at the quantum phase transition phase point at pressure about 14 kbar 3 .…”

Section: Resultsmentioning

confidence: 81%

“…The study of quantum criticality in the model substance of MnSi by doping with Fe and Co were carried out in Ref. [1][2][3][4] . The main idea was to imitate the highpressure condition by substituting Mn with smaller ions that would place the material in a situation where the pure MnSi experiences a quantum phase transition at zero temperature [5][6][7] .…”

Section: Introductionmentioning

confidence: 99%

Physical properties of MnSi at extreme doping with Co: Quantum criticality

Petrova,

Gavrilkin,

Tsvetkov

et al. 2022

Preprint

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The samples of (Mn1−xCox)Si with x = 0.15 and x = 0.17 were grown and their physical properties: magnetization and magnetic susceptibility, resistivity and heat capacity were studied. The data analysis included also the previous results at x = 0.057, 0.063, 0.09. The indicated doping MnSi with Co completely destroys the helical phase transition whereas basically saves the helical fluctuation area normally situated slightly above the phase transition temperature. This area spreading from ∼5 to 0 K is not changed much with doping and forms some sort of helical fluctuation cloud revealing the quantum critical properties: Cp/T → ∞ at T → 0.

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“…Yet another report suggested the restoration of a QCP in Mn 0.85 Fe 0.15 Si at a critical pressure of p QCP ∼ 21−23 kbar [23]. In contrast, however, a recent report disputed the emergence of a QCP in Mn 0.85 Fe 0.15 Si with pressure [24]. Although reports [22,23] claimed the restoration of a QCP as a function of doping and pressure, the nature of the QPT in MnSi remains elusive.…”

Section: Introductionmentioning

confidence: 99%

Disorder-induced critical exponents near a ferromagnetic quantum critical point in Mn1−xCrxSi

et al. 2020

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We report the observation of critical behavior in Mn 1−x Cr x Si (0 x 1) close to a T = 0 K quantum critical point, consistent with the Belitz-Kirkpatrick-Vojta (BKV) theory of disordered metallic ferromagnets. The critical exponents are in good agreement with the theoretical predictions of the BKV theory in the preasymptotic limit. A non-Fermi liquidlike behavior is seen down to 200 mK in the transport and thermodynamic properties around the critical concentration x C = 0.2. Quantum criticality and self-consistency of the exponents is further confirmed using a scaling analysis of the magnetization and heat capacity data. A recovery to Fermi liquidlike behavior is displayed on moving away from the critical composition, as well as with the application of a magnetic field.

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Physical properties of (Mn1−xFex)Si at x ≃0.15

Cited by 9 publications

References 26 publications

Evolution of helimagnetic correlations when approaching the quantum critical point of Mn1−xFexSi

Evolution of helimagnetic correlations when approaching the quantum critical point of Mn1−xFexSi

Physical properties of MnSi at extreme doping with Co: Quantum criticality

Disorder-induced critical exponents near a ferromagnetic quantum critical point in Mn1−xCrxSi

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