Signatures of enhanced ordering temperatures in digital superlattices of (LaMn O3) m (SrMn O3) 2m

A. Bhattacharya; X. Zhai; M. Warusawithana; J. N. Eckstein; S. D. Bader

doi:10.1063/1.2745205

Signatures of enhanced ordering temperatures in digital superlattices of (LaMn O3) m (SrMn O3) 2m

A. Bhattacharya, X. Zhai, M. Warusawithana, J. N. Eckstein, S. D. Bader

Research output: Contribution to journal › Article

Abstract

Digital superlattices of (LaMn O3) m (SrMn O3) 2m (m≤3) having the same nominal composition as La13 Sr23 Mn O3, an antiferromagnetic insulator, have been synthesized by means of molecular beam epitaxy. All superlattices show a sharp resistive maximum at temperatures near to or higher than the Ńel temperature of bulk La13 Sr23 Mn O3. No discernible signatures of magnetic ordering are observed near the resistivity peak for m≤2, but m=3 has a susceptibility peak consistent with antiferromagnet ordering, which is canted when cooled in a small magnetic field. Analogies are drawn to d x2 - y2 orbitally ordered, layered antiferromagnetic manganites to explain the observations.

Original language	English (US)
Article number	222503
Journal	Applied Physics Letters
Volume	90
Issue number	22
DOIs	https://doi.org/10.1063/1.2745205
State	Published - Jun 11 2007

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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Bhattacharya, A., Zhai, X., Warusawithana, M., Eckstein, J. N., & Bader, S. D. (2007). Signatures of enhanced ordering temperatures in digital superlattices of (LaMn O3) m (SrMn O3) 2m. Applied Physics Letters, 90(22), [222503]. https://doi.org/10.1063/1.2745205

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abstract = "Digital superlattices of (LaMn O3) m (SrMn O3) 2m (m≤3) having the same nominal composition as La13 Sr23 Mn O3, an antiferromagnetic insulator, have been synthesized by means of molecular beam epitaxy. All superlattices show a sharp resistive maximum at temperatures near to or higher than the {\'N}el temperature of bulk La13 Sr23 Mn O3. No discernible signatures of magnetic ordering are observed near the resistivity peak for m≤2, but m=3 has a susceptibility peak consistent with antiferromagnet ordering, which is canted when cooled in a small magnetic field. Analogies are drawn to d x2 - y2 orbitally ordered, layered antiferromagnetic manganites to explain the observations.",

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AU - Bhattacharya, A.

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AU - Eckstein, J. N.

AU - Bader, S. D.

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AB - Digital superlattices of (LaMn O3) m (SrMn O3) 2m (m≤3) having the same nominal composition as La13 Sr23 Mn O3, an antiferromagnetic insulator, have been synthesized by means of molecular beam epitaxy. All superlattices show a sharp resistive maximum at temperatures near to or higher than the Ńel temperature of bulk La13 Sr23 Mn O3. No discernible signatures of magnetic ordering are observed near the resistivity peak for m≤2, but m=3 has a susceptibility peak consistent with antiferromagnet ordering, which is canted when cooled in a small magnetic field. Analogies are drawn to d x2 - y2 orbitally ordered, layered antiferromagnetic manganites to explain the observations.

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