Spin freezing and magnetic inhomogeneities in bilayer manganites

2003/01/13 by A. I. Coldea, S. J. Blundell, Coldea, A. I. +7
Physics and Astronomy · #FOS: Physical sciences #Strongly Correlated Electrons (cond-mat.str-el) #cond-mat.str-el

paper · pdf · doi:10.48550/arxiv.cond-mat/0301177

RevTex, 4 pages, 4 figures

arxiv created 2003/01/13 · arxiv updated 2009/11/30

Abstract

We have performed a muon spin rotation study on polycrystalline samples of electron-doped layered manganites, La_2-2xSr_1+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.

Related

• Symmetry Does Not Allow Canting of Spins in La_1.4Sr_1.6Mn₂O₇
• Dynamical Response of Single Bi-layer Spin Model : A Theoretical Analysis
• Highly Degenerate Canted Spin Structure in Bilayer Manganite La_1.1Sr_1.9Mn₂O₇
• Observation of Kosterlitz-Thouless spin correlations in the colossally magnetoresistive layered manganite La_1.2Sr_1.8Mn₂O₇
• Absence of Long Range Magnetic Order in the La1.4Sr0.8Ca0.8Mn2O7 Bilayered Manganite