Structural and Magnetic Properties of ${\rm La}_{0.7}{\rm Sr}_{0.3}{\rm Mn}_{1-{\rm x}}{\rm Cr}_{\rm x}{\rm O}_{3}$ $({\rm x}\leq 0.5)$

Magnetic and structural properties of La
_0.7
Sr
_0.3
Mn
_1-x
Cr
_x
O
₃
(x = 0.05, 0.10, 0.20, 0.30, 0.40 and 0.50) have been studied using neutron and x-ray diffraction and magnetic measurements. All samples are found to be of single phase. At 12 K, we find only ferromagnetic ordering for x < 0.30 and coexisting ferromagnetic and antiferromagnetic domains for x ⩾ 0.30. Our magnetic data indicate temperature dependent ferromagnetic to paramagnetic, and likely antiferromagnetic to paramagnetic transitions. We find no evidence of spin glass or cluster glass behavior, only long-range magnetic order with a transition to antiferromagnetic behavior beginning with x = 0.30 and almost completely antiferromagnetic behavior at x = 0.50.