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Spin rotation, glassy state, and magnetization switching in ${it R}$CrO$$_{3}$$ (${it R}$=La$$_{1-x}$$Pr$$_{x}$$, Gd, and Tm); Reinvestigation of magnetization reversal

Yoshii, Kenji 

We have reinvestigated the magnetization reversal in perovskites La$$_{1-x}$$Pr$$_{x}$$CrO$$_{3}$$, GdCrO$$_{3}$$, and TmCrO$$_{3}$$ 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$$_{3}$$ and TmCrO$$_{3}$$, 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$$^{3+}$$-Cr$$^{3+}$$ coupling, as seen from magnetocalorimetry ($$R$$ = La$$_{1-x}$$Pr$$_{x}$$, Gd, and Tm). We also present a characteristic magnetization switching by rotating the R$$^{3+}$$ moments with the aid of large Zeeman energies.



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Category:Physics, Applied



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