Spin rotation, glassy state, and magnetization switching in CrO (=LaPr, Gd, and Tm); Reinvestigation of magnetization reversal

Yoshii, Kenji  

We have reinvestigated the magnetization reversal in perovskites LaPrCrO, GdCrO, and TmCrO and show that spin rotation or reorientation plays a key role in this property. The magnetization measurements on all systems show the appearance and disappearance of the reversal are commonly depend on a strength of a Zeeman energy at the rare earth site in analogy with spin rotation in GdCrO and TmCrO, denoted at the spin reorientation. Magnetic susceptibility measurements point to either superparamagnetic or single-molecule-magnet-like glassy behavior in all three systems, which is likely linked to a rotation of the R-Cr coupling, as seen from magnetocalorimetry ( = LaPr, Gd, and Tm). We also present a characteristic magnetization switching by rotating the R moments with the aid of large Zeeman energies.