Reentrant spin glass behavior in a layered manganite La1.2Sr1.8Mn2O7 single crystals

Abstract

We report here a detailed study of AC/DC magnetization and longitudinal/transverse transport properties of La${}_{1.2}$Sr${}_{1.8}$Mn${}_2$O${}_7$ single crystals below $T_c$ = 121 K. We find that the resistivity upturn below 40 K is related to the reentrant spin glass phase at the same temperature, accompanied by additional anomalous Hall effects. The carrier concentration from the ordinary Hall effects remains constant during the transition and is close to the nominal doping level (0.4 holes/Mn). The spin glass behavior comes from the competition between ferromagnetic double exchange and antiferromagnetic superexchange interactions, which leads to phase separation, i.e. a mixture of ferromagnetic and antiferromagnetic clusters, representing the canted antiferromagnetic state.

5 pages, 5 figures, submitted to Phys. Rev. B

References in corpus (3)

• Magnetotransport in manganites and the role of quantal phases II: Experiment
• Pseudogap Formation in Models for Manganites
• Breakdown of the lattice polaron picture in La0.7Ca0.3MnO3 single crystals

Cited by in corpus (6)

• Signatures of Spin Glass Freezing in NiO Nanoparticles
• Anomalous Hall effect as a probe of the chiral order in spin glasses
• Hall effect in heavy-fermion metals
• Observation of re-entrant spin glass behavior in (Ce1-xErx)Fe2 compounds
• Enhancement of the anomalous Hall effect and spin glass behavior in the bilayered manganite La(2-2x)Sr(1+2x)Mn2O7
• Ferromagnetic Clusters in the Brownmillerite Bilayered Compounds Ca2.5-xLaxSr0.5GaMn2O8: An Approach to Achieve Layered Spintronics Materials