Direct evidence of phase segregation and magnetic-field-induced structuraltransition in Nd0.5Sr0.5MnO3 by neutron diffraction

Authors
Ritter, C Mahendiran, R Ibarra, MR Morellon, L Maignan, A Raveau, B Rao, CNR
Citation
C. Ritter et al., Direct evidence of phase segregation and magnetic-field-induced structuraltransition in Nd0.5Sr0.5MnO3 by neutron diffraction, PHYS REV B, 61(14), 2000, pp. R9229-R9232
Citations number
21
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
10980121 → ACNP
Volume
61
Issue
14
Year of publication
2000
Pages
R9229 - R9232
Database
ISI
SICI code
1098-0121(20000401)61:14<R9229:DEOPSA>2.0.ZU;2-5
Abstract
We present direct evidence of die phase segregation and magnetic-field-indu ced structural transition in Nd0.5Sr0.5MnO3 as proposed earlier [R. Mahendi ran et al., Phys. Rev. Lett. 82, 2191 (1999)] for the collapse of the charg e-ordered insulating state. The spontaneous (H=0) low-temperature phase at 125 K is found to be phase segregated into two different crystallographic s tructures and three magnetic phases: orthorhombic (Imma) ferromagnetic, ort horhombic (Imma) A-type antiferromagnetic, and monoclinic (P2(1)/m) charge- ordered CE-type antiferromagnetic phases. Under a field of H=6 T, the charg e-ordered monoclinic phase collapses and completely transforms into the met allic ferromagnetic orthorhombic phase.