Magnetic properties of the (LaMnO3)N/(SrTiO 3)N atomic layer superlattices

Xiaofang Zhai; Chandra S. Mohapatra; Amish B. Shah; Jian Min Zuo; James N. Eckstein

doi:10.1063/1.4803873

Magnetic properties of the (LaMnO₃)_N/(SrTiO ₃)_N atomic layer superlattices

Xiaofang Zhai, Chandra S. Mohapatra, Amish B. Shah, Jian Min Zuo, James N. Eckstein

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Abstract

We studied the magnetic properties of atomic layer superlattices of (LaMnO₃)_N/(SrTiO₃)_N (N 1,2,8) fabricated by ozone-assisted atomic layer-by-layer molecular beam epitaxy. Compared to a reference LaMnO₃ thin film, the N 8 superlattice exhibits enhanced magnetization, while the N 1 and 2 superlattices exhibit suppressed magnetization. The onset temperature of the ferromagnetic transition is lowered in all superlattices. Moreover, the Brillouin function fits to the magnetic hysteresis curves indicate that the ground state of the superlattices consists of non-uniform spin interactions. The electric transport measurements suggest a very small variation of Mn valence (∼±0.015) that may not be enough to induce the observed large change in the magnetic property.

Original language	English (US)
Article number	173913
Journal	Journal of Applied Physics
Volume	113
Issue number	17
DOIs	https://doi.org/10.1063/1.4803873
State	Published - May 7 2013

ASJC Scopus subject areas

General Physics and Astronomy

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10.1063/1.4803873

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@article{fa7c0bbe033144849c4ee28d383b567b,

title = "Magnetic properties of the (LaMnO3)N/(SrTiO 3)N atomic layer superlattices",

abstract = "We studied the magnetic properties of atomic layer superlattices of (LaMnO3)N/(SrTiO3)N (N 1,2,8) fabricated by ozone-assisted atomic layer-by-layer molecular beam epitaxy. Compared to a reference LaMnO3 thin film, the N 8 superlattice exhibits enhanced magnetization, while the N 1 and 2 superlattices exhibit suppressed magnetization. The onset temperature of the ferromagnetic transition is lowered in all superlattices. Moreover, the Brillouin function fits to the magnetic hysteresis curves indicate that the ground state of the superlattices consists of non-uniform spin interactions. The electric transport measurements suggest a very small variation of Mn valence (∼±0.015) that may not be enough to induce the observed large change in the magnetic property.",

author = "Xiaofang Zhai and Mohapatra, {Chandra S.} and Shah, {Amish B.} and Zuo, {Jian Min} and Eckstein, {James N.}",

note = "Funding Information: The authors acknowledge support by the U.S. Department of Energy, Division of Materials Sciences through the Frederick Seitz Materials Research Laboratory at the University of Illinois at Urbana-Champaign. A.B.S. and J.M.Z. are supported by the U.S. Department of Energy, Division of Materials Sciences under Grant No. DEFG02-91ER45439 and Argonne National Laboratory under the U.S. Department of Energy Grant No. DE-AC02-06CH11357 Digital Synthesis FWP. X.Z. thanks the support from the National Natural Science Foundation of China (11104258) and the Fundamental Research Funds for the Central Universities (WK2340000018).",

year = "2013",

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doi = "10.1063/1.4803873",

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journal = "Journal of Applied Physics",

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T1 - Magnetic properties of the (LaMnO3)N/(SrTiO 3)N atomic layer superlattices

AU - Zhai, Xiaofang

AU - Mohapatra, Chandra S.

AU - Shah, Amish B.

AU - Zuo, Jian Min

AU - Eckstein, James N.

N1 - Funding Information: The authors acknowledge support by the U.S. Department of Energy, Division of Materials Sciences through the Frederick Seitz Materials Research Laboratory at the University of Illinois at Urbana-Champaign. A.B.S. and J.M.Z. are supported by the U.S. Department of Energy, Division of Materials Sciences under Grant No. DEFG02-91ER45439 and Argonne National Laboratory under the U.S. Department of Energy Grant No. DE-AC02-06CH11357 Digital Synthesis FWP. X.Z. thanks the support from the National Natural Science Foundation of China (11104258) and the Fundamental Research Funds for the Central Universities (WK2340000018).

PY - 2013/5/7

Y1 - 2013/5/7

N2 - We studied the magnetic properties of atomic layer superlattices of (LaMnO3)N/(SrTiO3)N (N 1,2,8) fabricated by ozone-assisted atomic layer-by-layer molecular beam epitaxy. Compared to a reference LaMnO3 thin film, the N 8 superlattice exhibits enhanced magnetization, while the N 1 and 2 superlattices exhibit suppressed magnetization. The onset temperature of the ferromagnetic transition is lowered in all superlattices. Moreover, the Brillouin function fits to the magnetic hysteresis curves indicate that the ground state of the superlattices consists of non-uniform spin interactions. The electric transport measurements suggest a very small variation of Mn valence (∼±0.015) that may not be enough to induce the observed large change in the magnetic property.

AB - We studied the magnetic properties of atomic layer superlattices of (LaMnO3)N/(SrTiO3)N (N 1,2,8) fabricated by ozone-assisted atomic layer-by-layer molecular beam epitaxy. Compared to a reference LaMnO3 thin film, the N 8 superlattice exhibits enhanced magnetization, while the N 1 and 2 superlattices exhibit suppressed magnetization. The onset temperature of the ferromagnetic transition is lowered in all superlattices. Moreover, the Brillouin function fits to the magnetic hysteresis curves indicate that the ground state of the superlattices consists of non-uniform spin interactions. The electric transport measurements suggest a very small variation of Mn valence (∼±0.015) that may not be enough to induce the observed large change in the magnetic property.

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