Orbital stability in the spin-ordered phase of bilayer manganites as investigated by neutron-diffraction measurements

Authors
Akimoto, T Moritomo, Y Ohoyama, K Okamoto, S Ishihara, S Maekawa, S Hirota, K Nakamura, A
Citation
T. Akimoto et al., Orbital stability in the spin-ordered phase of bilayer manganites as investigated by neutron-diffraction measurements, PHYS REV B, 61(17), 2000, pp. 11270-11273
Citations number
22
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
10980121 → ACNP
Volume
61
Issue
17
Year of publication
2000
Pages
11270 - 11273
Database
ISI
SICI code
1098-0121(20000501)61:17<11270:OSITSP>2.0.ZU;2-F
Abstract
Temperature variation of lattice structure has been investigated for ferrom agnetic La(Sr0.8Ca0.2)(2)Mn2O7 and layered-type (A-type) antiferromagnetic NdSr2Mn2O7. We have found that distortion of the MnO6 octahedra decreases i n the spin-ordered phase for both the systems. We further estimated the rel ative stability of the e(g) orbitals by means of Madelung potential calcula tion, and discussed the orbital state in the spin-ordered phase.