M. Demarco et al., Temperature dependence of the hyperfine magnetic field in SrRuO3 measured hy the Ru-99 Mossbauer effect, PHYS REV B, 62(21), 2000, pp. 14297-14300
The hyperfine magnetic held in the ferromagnetic metal, SrRuO3, has been me
asured from 4.2 to 166.3 K by the Ru-99 Mossbauer effect. The hyperfine fie
ld at 4.2 K is determined to be 33.0(0.4) T with an isomer shift of -0.33(.
02) mm/s. The Curie temperature is determined 162(2) K for a polycrystallin
e sample. This is consistent with the determination by Cao et al. [Phys. Re
v. B 56, 321 (1997)1 of T-C= 165 K for a single crystal. The Mossbauer effe
ct full width at half maximum linewidth at 166.3(0.1) K, above the Curie te
mperature, is as narrow as the natural linewidth of Mossbauer effect state
without broadening due to regions of short range ferromagnetic order. This
indicates that the compound at this temperature is in a paramagnetic state.