Phys. Rev. Lett. 89, 277601 (2002) [4 pages]Spin Freezing and Magnetic Inhomogeneities in Bilayer ManganitesReceived 28 August 2002; published 18 December 2002 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<100 K) for 0.52≤x<0.75. A new phase diagram which includes this spin-freezing region is proposed. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.277601
DOI:
10.1103/PhysRevLett.89.277601
PACS:
76.75.+i, 75.47.Lx, 75.50.Lk
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