Spin freezing and magnetic inhomogeneities in bilayer manganites
Coldea, A. I. · Blundell, S. J. · Steer, C. A. · Mitchell, J. F. · Pratt, F. L.
Original · EN
We have performed a muon spin rotation study on polycrystalline samples of electron-doped layered manganites, La₂₋₂ₓSr₁₊₂ₓMn₂O₇ (0.4< x<1), in order to investigate the local magnetic structure and spin dynamics. Our results provide evidence for phase separation into A-type antiferromagnetic and charge-ordered phases for x=0.52 and spin freezing at low temperatures (T<100K) for 0.52<x<0.75. A new phase diagram which includes this spin freezing region is proposed.
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