Nanoscale magnetic structure of ferromagnet/antiferromagnet manganite multilayers

Abstract

Polarized Neutron Reflectometry and magnetometry measurements have been used to obtain a comprehensive picture of the magnetic structure of a series of La{2/3}Sr{1/3}MnO{3}/Pr{2/3}Ca{1/3}MnO{3} (LSMO/PCMO) superlattices, with varying thickness of the antiferromagnetic (AFM) PCMO layers (0<=t_A<=7.6 nm). While LSMO presents a few magnetically frustrated monolayers at the interfaces with PCMO, in the latter a magnetic contribution due to FM inclusions within the AFM matrix was found to be maximized at t_A~3 nm. This enhancement of the FM moment occurs at the matching between layer thickness and cluster size, where the FM clusters would find the optimal strain conditions to be accommodated within the "non-FM" material. These results have important implications for tuning phase separation via the explicit control of strain.

4 pages, submitted to PRL

References in corpus (11)

• Colossal Magnetoresistant Materials: The Key Role of Phase Separation
• Extrinsic Magnetotransport Phenomena in Ferromagnetic Oxides
• Mesoscopic and Microscopic Phase Segregation in Manganese Perovskites
• Suppressed magnetization in La${}_{0.7}$Ca${}_{0.3}$MnO${}_3$/YBa${}_2$Cu${}_3$O${}_{7-\delta }$ superlattices
• Full Bulk Spin Polarization and Intrinsic Tunnel Barriers at the Surface of Layered Manganites
• Lamellar phase separation and dynamic competition in La0.23Ca0.77MnO3
• Magnetic field dependence of the magnetic phase separation in Pr1-xCaxMnO3 manganites studied by small-angle neutron scattering
• Field dependence of the electronic phase separation in Pr0.67Ca0.33MnO3 by small angle magnetic neutron scattering
• Exchange Field Induced Magnetoresistance in Colossal Magnetoresistance Manganites
• Enhancement of magnetoresistance in manganite multilayers
• Influence of oxygen isotope exchange on the ground state of manganites

Cited by in corpus (10)

• Magnetoelectric coupling at the interface of BiFeO3/La0.7Sr0.3MnO3 multilayers
• Tailoring magnetic anisotropy in epitaxial half metallic La0.7Sr0.3MnO3 thin films
• Effect of strain on the orbital and magnetic ordering of manganite thin films and their interface with an insulator
• Magnetoresistance in an all-manganite heterostructure
• Electronic and Magnetic Reconstructions in Manganite Superlattices
• Interfacial Magnetism in Manganite Superlattices
• Electron gas at the interface between two antiferromagnetic insulating manganites
• Colossal enhancement of magnetoresistance in La${}_{0.67}$Sr${}_{0.33}$MnO${}_3$ / Pr${}_{0.67}$Ca${}_{0.33}$MnO${}_3$ multilayers: reproducing the phase-separation scenario
• Giant magnetoelectric effect in pure manganite-manganite heterostructures
• Phase competitions in epitaxial Pr${}_{0.5}$Ca${}_{0.5}$MnO${}_3$/La${}_{0.5}$Sr${}_{0.5}$MnO${}_3$ superlattices