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29 March 2024
 
  » pubmed » pmid11736523

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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
T Koide ; H Miyauchi ; J Okamoto ; T Shidara ; T Sekine ; T Saitoh ; A Fujimori ; H Fukutani ; M Takano ; Y Takeda ;
Date 10 Dec 2001
Journal Phys Rev Lett, 87 (24), 246404
AbstractThe 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.
Source PubMed, pmid11736523
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