Tunneling magnetoresistance with positive and negative sign in La0.67Sr0.33MnO3/SrTiO3/Co junctions

I.J. Vera Marun; F.M. Postma; J.C. Lodder; R. Jansen

doi:10.1103/PhysRevB.76.064426

Tunneling magnetoresistance with positive and negative sign in La_0.67Sr_0.33MnO₃/SrTiO₃/Co junctions

I.J. Vera Marun
, F.M. Postma
, J.C. Lodder
, R. Jansen

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

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Abstract

We have investigated the effects of modification of the SrTiO3 /Co interface as well as the SrTiO3 barrier on the tunnel magnetoresistance TMR of La0.67Sr0.33MnO3 /SrTiO3 /Co junctions. Modification was realized by the introduction of one atomic layer of either TiO2 or SrO at the SrTiO3 /Co interface. Barriers with different oxygen content were also studied. In these structures we have observed positive as well as negative TMR, with a trend towards positive TMR for junctions with interfacial SrO and/or more oxygen-deficient barriers. This work offers more insight into the SrTiO3 /Co tunnel spin polarization and its sign.

Original language	English
Article number	064426
Number of pages	5
Journal	Physical review B: Condensed matter and materials physics
Volume	76
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevB.76.064426
Publication status	Published - 23 Aug 2007

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title = "Tunneling magnetoresistance with positive and negative sign in La0.67Sr0.33MnO3/SrTiO3/Co junctions",

abstract = "We have investigated the effects of modification of the SrTiO3 /Co interface as well as the SrTiO3 barrier on the tunnel magnetoresistance TMR of La0.67Sr0.33MnO3 /SrTiO3 /Co junctions. Modification was realized by the introduction of one atomic layer of either TiO2 or SrO at the SrTiO3 /Co interface. Barriers with different oxygen content were also studied. In these structures we have observed positive as well as negative TMR, with a trend towards positive TMR for junctions with interfacial SrO and/or more oxygen-deficient barriers. This work offers more insight into the SrTiO3 /Co tunnel spin polarization and its sign.",

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AU - Vera Marun, I.J.

AU - Postma, F.M.

AU - Lodder, J.C.

AU - Jansen, R.

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Y1 - 2007/8/23

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AB - We have investigated the effects of modification of the SrTiO3 /Co interface as well as the SrTiO3 barrier on the tunnel magnetoresistance TMR of La0.67Sr0.33MnO3 /SrTiO3 /Co junctions. Modification was realized by the introduction of one atomic layer of either TiO2 or SrO at the SrTiO3 /Co interface. Barriers with different oxygen content were also studied. In these structures we have observed positive as well as negative TMR, with a trend towards positive TMR for junctions with interfacial SrO and/or more oxygen-deficient barriers. This work offers more insight into the SrTiO3 /Co tunnel spin polarization and its sign.

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DO - 10.1103/PhysRevB.76.064426

M3 - Article

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JO - Physical review B: Condensed matter and materials physics

JF - Physical review B: Condensed matter and materials physics

IS - 6

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ER -

Tunneling magnetoresistance with positive and negative sign in La0.67Sr0.33MnO3/SrTiO3/Co junctions

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Tunneling magnetoresistance with positive and negative sign in La_0.67Sr_0.33MnO₃/SrTiO₃/Co junctions