Reentrant transition from an incipient charge-ordered state to a ferromagnetic metallic state in a rare-earth manganate

Journal Article · Wed Apr 01 04:00:00 EST 1998 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.57.R8115· OSTI ID:627559

Arulraj, A; Biswas, A; Raychaudhuri, A K; Rao, C N ^[1]; Woodward, P M; Vogt, T; Cox, D E ^[2]; Cheetham, A K ^[3]

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1. Solid State Structural Chemistry Unit and Department of Physics, Indian Institute of Science, Bangalore560012 (India)
2. Physics Department, Brookhaven National Laboratory, Upton, New York11973 (United States)
3. Materials Research Laboratory, University of California, Santa Barbara, California93106 (United States)

A reentrant transition from an incipient charge-ordered (CO) state to a charge-delocalized ferromagnetic (CDFM) state has been established in the manganate Nd{sub 0.25}La{sub 0.25}Ca{sub 0.5}MnO{sub 3}, in which the average A-site ionic radius is 1.19 {Angstrom}. The reentrant CDFM phase is associated with a first-order phase transition that reduces the orthorhombic distortion of the lattice, in contrast to the CO transition in other manganates where the orthorhombically distorted CO state is stabilized at low temperatures. At the CO-CDFM transition, there is a collapse of the charge-ordering gap as measured by vacuum tunneling spectroscopy. {copyright} {ital 1998} {ital The American Physical Society}

• OSTI ID: 627559
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 14 Vol. 57; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CALCIUM COMPOUNDS
CRYSTAL-PHASE TRANSFORMATIONS
FERROMAGNETIC MATERIALS
LANTHANUM COMPOUNDS
MAGNETIC PROPERTIES
MANGANATES
NEODYMIUM COMPOUNDS
ORDER-DISORDER TRANSFORMATIONS
ORTHORHOMBIC LATTICES