Magnetization distribution in the layered colossal magnetoresistance manganite La1.2Sr1.8Mn2O7 from polarized neutron diffraction

D. N. Argyriou, P. J. Brown, J. Gardner, R. H. Heffner

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

In the ferromagnetic metallic state of the colossal magnetoresistive (CMR) manganite La1.2Sr1.8Mn2O7, the spin-density distribution is essentially in agreement with the standard picture in which the unpaired electrons occupy the three t2g orbitals dxy, dyz, and dxz. However we find a small spin density (∼4% of the total Mn spin) on the apical O(2) oxygen atom at both 100 and 220 K, and we suggest that this is due to covalency effects. Surprisingly we find no evidence of spin on the other apical oxygen O(1) suggesting, that the Mn eg electron distribution along the c axis is highly anisotropic.

Original languageEnglish
Article number214431
Pages (from-to)2144311-2144315
Number of pages5
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume65
Issue number21
DOIs
StatePublished - Jun 1 2002
Externally publishedYes

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