Observation of an itinerant metamagnetic transition in MnSi under high pressure

Pressure effects of the ferromagnetic Heusler alloy Rh2NiGe

“…This value is comparable with those of d ln T C /dp for the very weak itinerant ferromagnets (VWIF) Fe x Co 1−x Si (x = 0.3, 0.4, 0.5 and 0.7) [21]. The value of d ln T C /dp for VWIF MnSi is about seven times larger than that of d ln T C /dp for Rh 2 NiGe in this study [22]. Takahashi has reported a new spin fluctuation theory for the weak itinerant electron ferromagnets, in which quantum spin fluctuations (zero-point spin fluctuations) are considered [17][18][19]23].…”

Structural and magnetic properties of Mn-implanted Si

“…During intense investigations on MnSi (a weak itinerant magnetic material), the ordering temperature has been found to strongly depend on lattice strain, induced, e.g., by hydrostatic pressure or by the lattice mismatch with substrate [27][28][29][30]. If the exchange interaction is changed for instance by pressure or by alloying, the system no longer orders even at T=0 K [27].…”

Tricritical behavior in MnSi at nearly hydrostatic pressure

“…These new observations put certain constraints on the origin of the tricritical point in MnSi. PACS numbers: 62.50.+p, 64.60.Kw, 75.30.Kz Recently, there has been a considerable interest in studying the magnetic phase transition in the intermetallic compound MnSi [1,2,3,4,5,6,7,8,9,10,11], which reveals weak ferromagnetic properties slightly below 30 K with spins having been ordered into a long wavelength helical structure [12,13] …”