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 › peer-review

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 - 2007

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Signatures of enhanced ordering temperatures in digital superlattices of (LaMn O3) m (SrMn O3) 2m",

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.",

author = "A. Bhattacharya and X. Zhai and M. Warusawithana and Eckstein, {J. N.} and Bader, {S. D.}",

note = "Funding Information: Work at Argonne was supported by the U.S. Department of Energy, Office of Basic Energy Sciences under Contract No. DE-AC02-06CH11357. The Center for Microanalysis of Materials at the University of Illinois, Urbana-Champaign is partially supported by the U.S. Department of Energy under Grant No. DEFG02-91-ER454.",

year = "2007",

doi = "10.1063/1.2745205",

language = "English (US)",

volume = "90",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics Publising LLC",

number = "22",

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T1 - Signatures of enhanced ordering temperatures in digital superlattices of (LaMn O3) m (SrMn O3) 2m

AU - Bhattacharya, A.

AU - Zhai, X.

AU - Warusawithana, M.

AU - Eckstein, J. N.

AU - Bader, S. D.

N1 - Funding Information: Work at Argonne was supported by the U.S. Department of Energy, Office of Basic Energy Sciences under Contract No. DE-AC02-06CH11357. The Center for Microanalysis of Materials at the University of Illinois, Urbana-Champaign is partially supported by the U.S. Department of Energy under Grant No. DEFG02-91-ER454.

PY - 2007

Y1 - 2007

N2 - 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.

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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IS - 22

M1 - 222503

ER -

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

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