Magnetic phase diagram of thin film La$_{2- x}$Sr$_ x$CuO$_4$ studied by low energy muon spin rotation
ORAL
Abstract
The magnetic phase diagram of La$_{2- x}$Sr$_ x$CuO$_4$ thin film samples grown on SrLaAlO$_4$ has been determined by low-energy muon spin rotation. The obtained phase diagram shows the same features as that one of the bulk, but the transition temperatures are drastically shifted. In the antiferromagnetic phase the Neel temperatures $T_{\rm N}$ are strongly reduced compared to the bulk material and no spin freezing was observed at low temperatures. In the disordered magnetic phase ($x \geq 0.02$) the transition temperature $T_{\rm g}$ is enhanced. It is concluded that the main reason for the pronounced differences between the magnetic phase diagrams of thin film and bulk samples is strain induced disorder in the thin films.
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