Direct evidence of phase segregation and magnetic-field-induced structural transition in $Nd_{0.5}Sr_{0.5}MnO_3$by neutron diffraction

Ritter, C and Mahendiran, R and Ibarra, MR and Morellon, L and Maignan, A and Raveau, B and Rao, CNR (2000) Direct evidence of phase segregation and magnetic-field-induced structural transition in $Nd_{0.5}Sr_{0.5}MnO_3$by neutron diffraction. In: Physical Review B, 61 (14). R9229-R9232.

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Abstract

We present direct evidence of the phase segregation and magnetic-field-induced structural transition in $Nd_{0.5}Sr_{0.5}MnO_3$ as proposed earlier [R. Mahendiran et al., Phys. Rev. Lett. 82, 2191 (1999)] for the collapse of the charge-ordered insulating state. The spontaneous (H=0) low-temperature phase at 125 K is found to be phase segregated into two different crystallographic structures and three magnetic phases: orthorhombic (Imma) ferromagnetic, orthorhombic (Imma) A-type antiferromagnetic, and monoclinic$ (P2_1/m)$ charge-ordered CE-type antiferromagnetic phases. Under a field of H=6 T, the charge-ordered monoclinic phase collapses and completely transforms into the metallic ferromagnetic orthorhombic phase.

Item Type:	Journal Article
Publication:	Physical Review B
Publisher:	American Physical Society
Additional Information:	Copyright of this article belongs to American Physical Society.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	25 Aug 2008
Last Modified:	19 Sep 2010 04:49
URI:	http://eprints.iisc.ac.in/id/eprint/15618

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