title: Close correlation between the magnetic moments, lattice distortions, and hybridization in LaMnO3 and La(1-x)Sr(x)MnO3+delta: doping-dependent magnetic circular X-ray dichroism study.
abstract: The first observation of a magnetic circular x-ray dichroism (MCXD) at the Mn L2,3 core edges in antiferromagnetic LaMnO3 shows canted spin and orbital ( m(orb)) moments arising from lattice distortions. An L2,3-edge MCXD in ferromagnetic metals and insulators, La1-xSr(x)MnO3+delta, reveals that m(orb) of Mn strongly depends on x in the metallic regime but remains unchanged with the metal-to-insulator transition (x approximately 0.16). An O K-edge MCXD, which shows m(orb) of O caused by 2p-3d hybridization, is much larger in the ferromagnetic metal than insulator phases, sharply contrasting with m(orb) of Mn. Our findings indicate a close magnetism-lattice-hybridization coupling.
authors.affiliation: Photon Factory, IMSS, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Koide
authors.forename: H
authors.initials: H
authors.lastname: Miyauchi
authors.forename: J
authors.initials: J
authors.lastname: Okamoto
authors.forename: T
authors.initials: T
authors.lastname: Shidara
authors.forename: T
authors.initials: T
authors.lastname: Sekine
authors.forename: T
authors.initials: T
authors.lastname: Saitoh
authors.forename: A
authors.initials: A
authors.lastname: Fujimori
authors.forename: H
authors.initials: H
authors.lastname: Fukutani
authors.forename: M
authors.initials: M
authors.lastname: Takano
authors.forename: Y
authors.initials: Y
authors.lastname: Takeda