Neutron diffraction study of history dependence in MnFeP0.6Si0.4

High/low-moment phase transition in hexagonal Mn-Fe-P-Si compounds

“…The refinement also indicates that P and Si are randomly distributed on the 2c and 1b sites. Earlier studies on MnFe(P,Si) have pointed out that the magnetic moments prefer to be in the ab plane rather than in the c direction, as observed in Fe 2 P. 15,16 In the present study, the low-temperature diffraction pattern fits well when the magnetic moments are aligned in the ab plane, indicating that replacing some Fe with Mn on the 3f sites does not affect the preferential alignment of the magnetic moments.…”

Magnetocaloric refrigeration near room temperature (invited)

“…While the total magnetic moment is not affected by changes of the composition, the Curie temperature increases from about 150 K to well above room temperature. We reinvestigated this part of the phase diagram [58,59] and investigated possibilities to partially replace the As [60][61][62].…”

Moment evolution across the ferromagnetic phase transition of giant magnetocaloric(Mn,Fe)2(P,Si,B)Yibole1, Guillou2, Caron3 et al. 2015Phys. Rev. BSelf Cite28372View full textAdd to dashboardCite

“…When both sites are * Yibole@tudelft.nl occupied by iron, a clear distinction is found between the low-moment 3f site and the high-moment 3g site [17]. The FOMT of these materials has been extensively characterized; in particular, the structural evolution across the FOMT is now well documented [18][19][20][21][22][23]. All these studies support the magnetoelastic nature of the first-order ferro-to-paramagnetic transition, which leads to a discontinuity in the ratio of the cell parameters (c/a), but keeps the hexagonal structure unmodified with a negligible volume change.…”