Strengthened caloric effect in MnCoSi under combined applications of magnetic field and hydrostatic pressure

Large Cryogenic Magnetostriction Induced by Hydrostatic Pressure in MnCo0.92Ni0.08Si Alloy

“…This means that the meta-magnetic transition of the MnCo 0.92 Ni 0.08 Si alloy can be induced at a lower temperature when the sample was subjected to hydrostatic pressuring. In general, the meta-magnetic transition would be modified by external hydrostatic pressure since AFM-FM competition has an intimate relationship with the lattice parameters of MnCoSi-based alloys and pressure-induced unit cell shrinkage is inevitable [ 15 ].…”

“…The MnCoSi-based alloys are termed as the most promising candidate owing to their lower cost and higher magnetostrictive coefficient [ 10 ]. In addition, MnCoSi-based alloys as a new type of magneto-response material have attracted increasing attention, due to their rich magnetic structure (cycloid type and helical type antiferromagnetic structure, linear ferromagnetic structure) [ 11 , 12 , 13 ] and rich functional behaviors (magnetocaloric effect [ 14 , 15 ], magnetostrictive effect [ 8 , 9 ], anomalous thermal expansion effect [ 13 , 16 ] and magnetoresistance effect [ 17 , 18 ]).…”

“…Zavorotnev et al have reported that ferromagnetic occurrence was induced by hydrostatic pressure in the antiferromagnetic region of MnCoSi alloy [ 29 ]. Liu et al have demonstrated that pressure-induced enhanced magnetocaloric effect decreased the critical magnetic field of the MnCoSi alloy [ 15 , 28 ]. Compared under ambient pressure, the maximum magnetic entropy change of MnCoSi alloy at magnetic field 0 ~ 5 T was improved by 35.7% when a 3.2 kbar hydrostatic pressure was applied [ 15 ].…”

“…Liu et al have demonstrated that pressure-induced enhanced magnetocaloric effect decreased the critical magnetic field of the MnCoSi alloy [ 15 , 28 ]. Compared under ambient pressure, the maximum magnetic entropy change of MnCoSi alloy at magnetic field 0 ~ 5 T was improved by 35.7% when a 3.2 kbar hydrostatic pressure was applied [ 15 ]. The hydrostatic pressure results in the reduction of the critical field for meta-magnetic transition and of the AFM-to-FM transition temperature, which can be ascribed to the reduction of the critical a Orth -axis and stabilization of the FM state [ 15 , 29 ].…”

“…Compared under ambient pressure, the maximum magnetic entropy change of MnCoSi alloy at magnetic field 0 ~ 5 T was improved by 35.7% when a 3.2 kbar hydrostatic pressure was applied [ 15 ]. The hydrostatic pressure results in the reduction of the critical field for meta-magnetic transition and of the AFM-to-FM transition temperature, which can be ascribed to the reduction of the critical a Orth -axis and stabilization of the FM state [ 15 , 29 ]. Therefore, hydrostatic pressure is an effective method to adjust the magnetic properties of MnCoSi-based alloy.…”