The spin orientation type phase transition in SmCrO3 at T?34°K has been studied by means of bulk magnetization, sound wave propagation and specific heat measurements. The high and low temperature phases belong to Γ4(Cr:GxFz) and Γ2(Cr:GzFx) respectively. We find a reorientation region of ∠1°K with the beginning and the end points corresponding to second order phase transitions. Though common in the orthoferrites, this is the first clear evidence of a continuous spin reorientation in a RCrO3 compound. The continuous nature of the reorientation process is evident from peaks in the a and c axis susceptibilities and the softening of the elastic constant C55 at both ends of the transition region due to a resonant magnetoelastic coupling. From the anomaly in the specific heat, the entropy associated with the spin reorientation is found to be ΔE/R=0.21+/-0.01°K.
|Original language||English GB|
|Journal||AIP Conference Proceedings|
|State||Published - 1 May 1976|
- Spin arrangements in magnetically ordered materials