Showing papers by "Mahesh Kumar published in 2006"
TL;DR: SrFeO3−δ belongs to the Ruddlesden-Popper class of systems exhibiting interesting electronic and magnetic properties as discussed by the authors, and exhibits a canted antiferromagnetic spin ordering.
Abstract: SrFeO3−δ belongs to the Ruddlesden-Popper class of systems exhibiting interesting electronic and magnetic properties Ti4+-doped, oxygen-deficient SrFeO3−δ(SrFexTi1−xO3−δ; x=09 and 07) samples show canted antiferromagnetic spin ordering, in contrast to the undoped sample (x=1) which is known to exhibit a metallic behavior with a helical spin arrangement ac susceptibility χac (f,T) at 10⩽T⩽300K shows a frequency (100Hz⩽f⩽10kHz)-dependent temperature maximum, reminiscent of a spin-glass behavior Increasing the Ti4+ content reduces the irreversibility, indicating a decrease in the frustration, which results in a diluted helical spin structure Hysteresis loops can be associated with a gradual reorientation of spins in the field direction, indicating a canted type of spin arrangement
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