Itinerant helimagnet MnSi

Стишов, С. М.; Petrova, A. E.

doi:10.3367/ufne.0181.201111b.1157

Cited by 81 publications

(50 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, the Mn x Si 1-x (x≈0.5) thin layers grown on Si(001) or Al 2 O 3 (0001) substrates demonstrate the high-temperature (HT) ferromagnetism (FM) with the Curie temperature T c of the order of room temperature. [2][3][4] This fact is in contrast to the case of bulk ε-MnSi single crystal, where only the low-temperature (LT) FM was reported with T C ≈ 30 K. 8,9 The HT FM order at x 0.506 (that just corresponds to the single crystal ε-MnSi belonging to berthollides 9,10 ) was observed in the Mn x Si 1-x /Si(001) structures but at enough small Mn x Si 1-x film thickness less than one ε-MnSi monolayer. 2,11 This order is explained by the formation of c-MnSi phase with B2-like (CsCl) crystal structure stabilized with tetragonal distortion due to favorable lattice mismatch between the film and substrate.…”

Section: Introductionmentioning

confidence: 41%

“…X-ray diffraction analysis reveals that textured ε-MnSi-like phase with the B20-type crystal structure dominates in both SG and DG type of films. While the ε-MnSi single crystal has the Curie temperature T C ≈ 30 K, 8,9 the studied Mn x Si 1-x films at x ≈ 0.52 exhibit HT FM with T C > 300 K accompanied by the manifestation of the positive sign of AHE. For SG grown Mn x Si 1-x films, it is found that at low temperature the essential contribution to the magnetization is given by LT FM phase with T C ≈ 46 K; at the same time, AHE changes the sign from the positive to negative at T ≤ 30K and film thickness d ≥ 90 nm.…”

Section: -12mentioning

confidence: 99%

“…The magnetization saturates in the magnetic field µ 0 H ≈ 0.6 T at low temperature (T = 5 K) and then linearly increases like in the case of ε-MnSi single crystal. 9,20 At room temperature the saturation field value decreases till µ 0 H ≈ 0.2 T.…”

Section: Magnetic and Magneto-transport Measurementsmentioning

confidence: 99%

See 2 more Smart Citations

Ferromagnetism of MnxSi1-x(x ∼ 0.5) films grown in the shadow geometry by pulsed laser deposition method

et al. 2016

View full text Add to dashboard Cite

Absence of anomalous Nernst effect in spin Seebeck effect of Pt/YIG AIP Advances 6, 015018 (2016); 10.1063/1.4941340Dual resonant structure for energy harvesting from random vibration sources at low frequency AIP Advances 6, 015019 (2016) The results of a comprehensive study of magnetic, magneto-transport and structural properties of nonstoichiometric Mn x Si 1-x (x≈0.51-0.52) films grown by the Pulsed Laser Deposition (PLD) technique onto Al 2 O 3 (0001) single crystal substrates at T = 340 • C are present. A highlight of used PLD method is the non-conventional ("shadow") geometry with Kr as a scattering gas during the sample growth. It is found that the films exhibit high-temperature (HT) ferromagnetism (FM) with the Curie temperature T C ∼ 370 K accompanied by positive sign anomalous Hall effect (AHE); they also reveal the polycrystalline structure with unusual distribution of grains in size and shape. It is established that HT FM order is originated from the bottom interfacial self-organizing nanocrystalline layer. The upper layer adopted columnar structure with the lateral grain size ≥ 50 nm, possesses low temperature (LT) type of FM order with T c

show abstract

Section: Introductionmentioning

confidence: 41%

Section: -12mentioning

confidence: 99%

See 1 more Smart Citation

Ferromagnetism of MnxSi1-x(x ∼ 0.5) films grown in the shadow geometry by pulsed laser deposition method

et al. 2016

View full text Add to dashboard Cite

show abstract

“…[20][21][22] At temperatures 1-2 K above T C in ambient pressure, the spin correlation length ξ in MnSi becomes comparable to the pitch length l~18 nm of the helical spiral, transforming the ferromagnetic critical behavior into helical spin fluctuations. The process of stabilizing the helical fluctuations by I leads to weakly first-order behavior at T C , as detected by neutron scattering (chiral fluctuations), 10,[20][21][22] transport (sharp peaking in the T-derivative of the resistivity), 11,23 and specific heat 23 (a shoulder above T C with a sharp peak at T C ). In MuSR studies, this feature is manifest as a discontinuous change of the order parameter below T C 24 and a modification of the critical exponent above T C .…”

Section: Introductionmentioning

confidence: 99%

Restoration of quantum critical behavior by disorder in pressure-tuned (Mn,Fe)Si

et al. 2017

View full text Add to dashboard Cite

In second-order quantum phase transitions from magnetically ordered to paramagnetic states at T = 0, tuned by pressure or chemical substitution, a quantum critical point is expected to appear with critical behavior manifesting in the slowing down of spin fluctuations in the paramagnetic state and a continuous development of the order parameter in the ordered state. Quantum criticality is discussed widely as a possible driving force for unconventional superconductivity and other exotic phenomena in correlated electron systems. In the real world, however, quantum critical points and quantum criticality are often masked by a preceding first-order transition and/or the development of competing states. Pressure tuning of the itinerant-electron helical magnet MnSi is a well-known example of the suppression of a quantum critical point due to a first-order phase transition and resulting destruction of the ordered state. Utilizing muon spin relaxation experiments, here we report that 15% Fe-substituted (Mn,Fe)Si exhibits completely different behavior with pressure tuning, including the restoration of second-order quantum critical behavior and a quantum critical point at p QPC~2 1-23 kbar, which coincides with the T = 0 crossing point of the extrapolated phase boundary line of pure MnSi. This result is quantitatively consistent with the recent theory of itinerant-electron ferromagnets by Sang, Belitz, and Kirkpatrick, who argued that disorder would restore a quantum critical point which is otherwise hidden by a firstorder transition.

show abstract

“…In this region, the heat capacity, magnetic susceptibility, temperature coefficient of electric resistance, etc., exhibit anoma lous behavior (see, e.g., [2]). The nature of this behav ior in the properties of MnSi is still not completely clear.…”

Section: Introductionmentioning

confidence: 99%