In situ photoemission characterization of the tunneling barrier in La0.6 Sr0.4 MnO3 SrTiO3 / La0.6 Sr0.4 MnO3 tunneling junctions

H. Kumigashira; R. Hashimoto; A. Chikamatsu; M. Oshima; H. Wadati; A. Fujimori; M. Lippmaa; M. Kawasaki; H. Koinuma

doi:10.1016/j.jmmm.2006.10.690

In situ photoemission characterization of the tunneling barrier in La_0.6 Sr_0.4 MnO₃ SrTiO₃ / La_0.6 Sr_0.4 MnO₃ tunneling junctions

H. Kumigashira, R. Hashimoto, A. Chikamatsu, M. Oshima, H. Wadati, A. Fujimori, M. Lippmaa, M. Kawasaki, H. Koinuma

IMRAM - Division of Inorganic Material Research

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

Abstract

We have performed Ti 2p core-level photoemission and X-ray absorption spectroscopic (XAS) studies on the insulating barrier SrTiO₃ (STO) layer sandwiched by La_0.6 Sr_0.4 MnO₃ (LSMO) layers. The elemental selectivity of the techniques enabled us to extract the electronic structure of the constituent layers in the vicinity of the heterointerfaces. The Ti 2p core-level and XAS spectra clearly showed Ti^{4 +} states and did not exhibit any indication of Ti^{3 +} states. This result indicates that the Ti ions in the TiO₂ atomic layers preserve their tetravalent states even in the vicinity of the valence-mismatched interface between LSMO and STO, reflecting the chemical stability of the Ti^{4 +} states.

Original language	English
Pages (from-to)	1997-1999
Number of pages	3
Journal	Journal of Magnetism and Magnetic Materials
Volume	310
Issue number	2 SUPPL. PART 3
DOIs	https://doi.org/10.1016/j.jmmm.2006.10.690
Publication status	Published - 2007 Mar

Keywords

Laser MBE
Magnetic tunneling junction
Manganite

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10.1016/j.jmmm.2006.10.690

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Kumigashira, H., Hashimoto, R., Chikamatsu, A., Oshima, M., Wadati, H., Fujimori, A., Lippmaa, M., Kawasaki, M., & Koinuma, H. (2007). In situ photoemission characterization of the tunneling barrier in La_0.6 Sr_0.4 MnO₃ SrTiO₃ / La_0.6 Sr_0.4 MnO₃ tunneling junctions. Journal of Magnetism and Magnetic Materials, 310(2 SUPPL. PART 3), 1997-1999. https://doi.org/10.1016/j.jmmm.2006.10.690

@article{27d3aa3549884733869ad06f909ae382,

title = "In situ photoemission characterization of the tunneling barrier in La0.6 Sr0.4 MnO3 SrTiO3 / La0.6 Sr0.4 MnO3 tunneling junctions",

abstract = "We have performed Ti 2p core-level photoemission and X-ray absorption spectroscopic (XAS) studies on the insulating barrier SrTiO3 (STO) layer sandwiched by La0.6 Sr0.4 MnO3 (LSMO) layers. The elemental selectivity of the techniques enabled us to extract the electronic structure of the constituent layers in the vicinity of the heterointerfaces. The Ti 2p core-level and XAS spectra clearly showed Ti4 + states and did not exhibit any indication of Ti3 + states. This result indicates that the Ti ions in the TiO2 atomic layers preserve their tetravalent states even in the vicinity of the valence-mismatched interface between LSMO and STO, reflecting the chemical stability of the Ti4 + states.",

keywords = "Laser MBE, Magnetic tunneling junction, Manganite",

author = "H. Kumigashira and R. Hashimoto and A. Chikamatsu and M. Oshima and H. Wadati and A. Fujimori and M. Lippmaa and M. Kawasaki and H. Koinuma",

note = "Funding Information: This work was supported by Grants-in-Aid for Scientific Research (S17101004 and A16204024) from JSPS.",

year = "2007",

month = mar,

doi = "10.1016/j.jmmm.2006.10.690",

language = "English",

volume = "310",

pages = "1997--1999",

journal = "Journal of Magnetism and Magnetic Materials",

issn = "0304-8853",

publisher = "Elsevier",

number = "2 SUPPL. PART 3",

}

Kumigashira, H, Hashimoto, R, Chikamatsu, A, Oshima, M, Wadati, H, Fujimori, A, Lippmaa, M, Kawasaki, M & Koinuma, H 2007, 'In situ photoemission characterization of the tunneling barrier in La_0.6 Sr_0.4 MnO₃ SrTiO₃ / La_0.6 Sr_0.4 MnO₃ tunneling junctions', Journal of Magnetism and Magnetic Materials, vol. 310, no. 2 SUPPL. PART 3, pp. 1997-1999. https://doi.org/10.1016/j.jmmm.2006.10.690

TY - JOUR

T1 - In situ photoemission characterization of the tunneling barrier in La0.6 Sr0.4 MnO3 SrTiO3 / La0.6 Sr0.4 MnO3 tunneling junctions

AU - Kumigashira, H.

AU - Hashimoto, R.

AU - Chikamatsu, A.

AU - Oshima, M.

AU - Wadati, H.

AU - Fujimori, A.

AU - Lippmaa, M.

AU - Kawasaki, M.

AU - Koinuma, H.

N1 - Funding Information: This work was supported by Grants-in-Aid for Scientific Research (S17101004 and A16204024) from JSPS.

PY - 2007/3

Y1 - 2007/3

N2 - We have performed Ti 2p core-level photoemission and X-ray absorption spectroscopic (XAS) studies on the insulating barrier SrTiO3 (STO) layer sandwiched by La0.6 Sr0.4 MnO3 (LSMO) layers. The elemental selectivity of the techniques enabled us to extract the electronic structure of the constituent layers in the vicinity of the heterointerfaces. The Ti 2p core-level and XAS spectra clearly showed Ti4 + states and did not exhibit any indication of Ti3 + states. This result indicates that the Ti ions in the TiO2 atomic layers preserve their tetravalent states even in the vicinity of the valence-mismatched interface between LSMO and STO, reflecting the chemical stability of the Ti4 + states.

AB - We have performed Ti 2p core-level photoemission and X-ray absorption spectroscopic (XAS) studies on the insulating barrier SrTiO3 (STO) layer sandwiched by La0.6 Sr0.4 MnO3 (LSMO) layers. The elemental selectivity of the techniques enabled us to extract the electronic structure of the constituent layers in the vicinity of the heterointerfaces. The Ti 2p core-level and XAS spectra clearly showed Ti4 + states and did not exhibit any indication of Ti3 + states. This result indicates that the Ti ions in the TiO2 atomic layers preserve their tetravalent states even in the vicinity of the valence-mismatched interface between LSMO and STO, reflecting the chemical stability of the Ti4 + states.

KW - Laser MBE

KW - Magnetic tunneling junction

KW - Manganite

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U2 - 10.1016/j.jmmm.2006.10.690

DO - 10.1016/j.jmmm.2006.10.690

M3 - Article

AN - SCOPUS:33847645339

SN - 0304-8853

VL - 310

SP - 1997

EP - 1999

JO - Journal of Magnetism and Magnetic Materials

JF - Journal of Magnetism and Magnetic Materials

IS - 2 SUPPL. PART 3

ER -

In situ photoemission characterization of the tunneling barrier in La_0.6 Sr_0.4 MnO₃ SrTiO₃ / La_0.6 Sr_0.4 MnO₃ tunneling junctions

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Keywords

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