Electrical and Magnetic Properties of ${\rm Sr}({\rm Ru},{\rm Cr}){\rm O}_{3}$ Thin Films

Cr-doped SrRuO
₃
(SRCO) thin films were grown on an SrTiO
₃
(STO) (001) substrate using a pulsed laser deposition method in order to study the effects of the Cr doping. Measurements of the out-of-plane lattice constant and the electrical and magnetic properties indicate that Cr is incorporated into the B-site of the SRO lattice. Magnetic hysteresis measurements reveal a ferromagnetic nature with a saturation magnetization of about 0.75 ¿
_B
/Ru. The magnetization measurement of Sr(Ru
_0.9
Cr
_0.1
)O
₃
showed a ferromagnetic transition temperature
T

_C
= 165 K. This
T

_C
value is about 13 K higher than that reported for SrRuO
₃
thin films. The
T

_C
enhancement due to Cr doping in SrRuO
₃
thin film was less than that observed for the bulk sample. Electrical resistivity measurements of the SRCO thin films reveal metallic behavior, with a much larger residual resistivity of ~260 ¿¿ cm compared to 26 ¿¿ cm for SrRuO
₃
thin films.