Reentrant insulating state in ultrathin manganite films

Bongju Kim; Daeyoung Kwon; Takeaki Yajima; Christopher Bell; Yasuyuki Hikita; Bog G. Kim; Harold Y. Hwang

doi:10.1063/1.3628659

Reentrant insulating state in ultrathin manganite films

Bongju Kim, Daeyoung Kwon, Takeaki Yajima, Christopher Bell, Yasuyuki Hikita, Bog G. Kim, Harold Y. Hwang

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

The transport and magnetic properties of La_0.7Sr _0.3MnO₃ thin-films grown by pulsed laser deposition on (LaAlO₃)_0.3(SrAl_0.5Ta_0.5O ₃)_0.7 single crystal substrates have been investigated. A systematic series with various thicknesses of La_0.7Sr _0.3MnO₃ was used to establish a phase diagram which showed a clear difference compared to films grown on SrTiO₃ substrates, highlighting the importance of film thickness, and substrate strain. At 8 unit cells, the boundary between the metallic and insulating groundstates, a second abrupt metal-insulator transition was observed at low temperatures, which could be tuned by magnetic field, and was interpreted as a signature of electronic phase separation.

Original language	English
Article number	092513
Journal	Applied Physics Letters
Volume	99
Issue number	9
DOIs	https://doi.org/10.1063/1.3628659
Publication status	Published - Aug 29 2011
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.3628659

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title = "Reentrant insulating state in ultrathin manganite films",

abstract = "The transport and magnetic properties of La0.7Sr 0.3MnO3 thin-films grown by pulsed laser deposition on (LaAlO3)0.3(SrAl0.5Ta0.5O 3)0.7 single crystal substrates have been investigated. A systematic series with various thicknesses of La0.7Sr 0.3MnO3 was used to establish a phase diagram which showed a clear difference compared to films grown on SrTiO3 substrates, highlighting the importance of film thickness, and substrate strain. At 8 unit cells, the boundary between the metallic and insulating groundstates, a second abrupt metal-insulator transition was observed at low temperatures, which could be tuned by magnetic field, and was interpreted as a signature of electronic phase separation.",

author = "Bongju Kim and Daeyoung Kwon and Takeaki Yajima and Christopher Bell and Yasuyuki Hikita and Kim, {Bog G.} and Hwang, {Harold Y.}",

note = "Funding Information: We acknowledge support from the South Korean National Research Foundation (NRF) funded by the Ministry of Education, Science, and Technology (2011-0002511 and 2011-0006-055). H.Y.H. and C.B. acknowledge support by the Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, under Contract No. DE-AC02-76SF00515.",

year = "2011",

month = aug,

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doi = "10.1063/1.3628659",

language = "English",

volume = "99",

journal = "Applied Physics Letters",

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T1 - Reentrant insulating state in ultrathin manganite films

AU - Kim, Bongju

AU - Kwon, Daeyoung

AU - Yajima, Takeaki

AU - Bell, Christopher

AU - Hikita, Yasuyuki

AU - Kim, Bog G.

AU - Hwang, Harold Y.

N1 - Funding Information: We acknowledge support from the South Korean National Research Foundation (NRF) funded by the Ministry of Education, Science, and Technology (2011-0002511 and 2011-0006-055). H.Y.H. and C.B. acknowledge support by the Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, under Contract No. DE-AC02-76SF00515.

PY - 2011/8/29

Y1 - 2011/8/29

N2 - The transport and magnetic properties of La0.7Sr 0.3MnO3 thin-films grown by pulsed laser deposition on (LaAlO3)0.3(SrAl0.5Ta0.5O 3)0.7 single crystal substrates have been investigated. A systematic series with various thicknesses of La0.7Sr 0.3MnO3 was used to establish a phase diagram which showed a clear difference compared to films grown on SrTiO3 substrates, highlighting the importance of film thickness, and substrate strain. At 8 unit cells, the boundary between the metallic and insulating groundstates, a second abrupt metal-insulator transition was observed at low temperatures, which could be tuned by magnetic field, and was interpreted as a signature of electronic phase separation.

AB - The transport and magnetic properties of La0.7Sr 0.3MnO3 thin-films grown by pulsed laser deposition on (LaAlO3)0.3(SrAl0.5Ta0.5O 3)0.7 single crystal substrates have been investigated. A systematic series with various thicknesses of La0.7Sr 0.3MnO3 was used to establish a phase diagram which showed a clear difference compared to films grown on SrTiO3 substrates, highlighting the importance of film thickness, and substrate strain. At 8 unit cells, the boundary between the metallic and insulating groundstates, a second abrupt metal-insulator transition was observed at low temperatures, which could be tuned by magnetic field, and was interpreted as a signature of electronic phase separation.

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IS - 9

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ER -

Reentrant insulating state in ultrathin manganite films

Abstract

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