Defect scattering in high Tc and colossal magnetoresistive tunnel junctions

J. N. Eckstein; J. O'Donnell; Seongshik Oh; A. E. Andrus; M. Warusawathana; E. Bertram; Bruce A. Davidson; I. Bozovic

doi:10.1016/S0921-4534(00)00168-4

Defect scattering in high T_c and colossal magnetoresistive tunnel junctions

J. N. Eckstein, J. O'Donnell, Seongshik Oh, A. E. Andrus, M. Warusawathana, E. Bertram, Bruce A. Davidson, I. Bozovic

Physics

Research output: Contribution to journal › Conference article › peer-review

Abstract

Disorder causes both superconducting cuprate and colossal magnetoresistive manganite based tunnel junctions to depart from properties based solely on the superconductivity or magnetism inherent in the materials. Amorphous barrier layers cause diffuse reflection of quasiparticle states at the insulator-superconductor interface, resulting in a local quenching of the d-wave order parameter. A subdominant order parameter evolves at low temperatures in these layers. In manganites, interface disorder reduces spin polarization and causes the tunneling magnetoresistance in spin valve devices to be smaller than in junctions with less disorder.

Original language	English (US)
Pages (from-to)	184-189
Number of pages	6
Journal	Physica C: Superconductivity and its applications
Volume	335
Issue number	1
DOIs	https://doi.org/10.1016/S0921-4534(00)00168-4
State	Published - Jun 2000
Event	9th Japan-US Workshop on High-Tc Superconductors - Yamanashi, Jpn Duration: Oct 13 1999 → Oct 15 1999

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Online availability

10.1016/S0921-4534(00)00168-4

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Cite this

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title = "Defect scattering in high Tc and colossal magnetoresistive tunnel junctions",

abstract = "Disorder causes both superconducting cuprate and colossal magnetoresistive manganite based tunnel junctions to depart from properties based solely on the superconductivity or magnetism inherent in the materials. Amorphous barrier layers cause diffuse reflection of quasiparticle states at the insulator-superconductor interface, resulting in a local quenching of the d-wave order parameter. A subdominant order parameter evolves at low temperatures in these layers. In manganites, interface disorder reduces spin polarization and causes the tunneling magnetoresistance in spin valve devices to be smaller than in junctions with less disorder.",

author = "Eckstein, {J. N.} and J. O'Donnell and Seongshik Oh and Andrus, {A. E.} and M. Warusawathana and E. Bertram and Davidson, {Bruce A.} and I. Bozovic",

note = "Funding Information: This work has been supported at the University of Illinois by the Office of Naval Research under grant number N00014-98-, and by the National Science Foundation under grants number. The authors would like to thank L.H. Greene, D. Van Harlingen, P. Goldbart, Y. Lyanda-Geller and M. Salamon for useful discussions.; 9th Japan-US Workshop on High-Tc Superconductors ; Conference date: 13-10-1999 Through 15-10-1999",

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journal = "Physica C: Superconductivity and its applications",

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T1 - Defect scattering in high Tc and colossal magnetoresistive tunnel junctions

AU - Eckstein, J. N.

AU - O'Donnell, J.

AU - Oh, Seongshik

AU - Andrus, A. E.

AU - Warusawathana, M.

AU - Bertram, E.

AU - Davidson, Bruce A.

AU - Bozovic, I.

N1 - Funding Information: This work has been supported at the University of Illinois by the Office of Naval Research under grant number N00014-98-, and by the National Science Foundation under grants number. The authors would like to thank L.H. Greene, D. Van Harlingen, P. Goldbart, Y. Lyanda-Geller and M. Salamon for useful discussions.

PY - 2000/6

Y1 - 2000/6

N2 - Disorder causes both superconducting cuprate and colossal magnetoresistive manganite based tunnel junctions to depart from properties based solely on the superconductivity or magnetism inherent in the materials. Amorphous barrier layers cause diffuse reflection of quasiparticle states at the insulator-superconductor interface, resulting in a local quenching of the d-wave order parameter. A subdominant order parameter evolves at low temperatures in these layers. In manganites, interface disorder reduces spin polarization and causes the tunneling magnetoresistance in spin valve devices to be smaller than in junctions with less disorder.

AB - Disorder causes both superconducting cuprate and colossal magnetoresistive manganite based tunnel junctions to depart from properties based solely on the superconductivity or magnetism inherent in the materials. Amorphous barrier layers cause diffuse reflection of quasiparticle states at the insulator-superconductor interface, resulting in a local quenching of the d-wave order parameter. A subdominant order parameter evolves at low temperatures in these layers. In manganites, interface disorder reduces spin polarization and causes the tunneling magnetoresistance in spin valve devices to be smaller than in junctions with less disorder.

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