Large magnetoresistance of thick polymer devices having La0.67 Sr0.33 MnO3 electrodes

A. Ozbay; E. R. Nowak; Z. G. Yu; W. Chu; Yijian Shi; S. Krishnamurthy; Z. Tang; Nathan Newman

doi:10.1063/1.3271772

Large magnetoresistance of thick polymer devices having La_0.67 Sr_0.33 MnO₃ electrodes

A. Ozbay, E. R. Nowak, Z. G. Yu, W. Chu, Yijian Shi, S. Krishnamurthy, Z. Tang, Nathan Newman

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

22 Scopus citations

Abstract

We report magnetoresistance (MR) measurements for structures with micrometer-thick regioregular, polythiophene (rr-P3HT) polymer layers between two ferromagnetic contacts. Hole spin transport through the polymer layer leads to a relative MR value in 300 mT fields of 0.3% at 300 K and increasing to 18% at 25 K. The inferred intrinsic spin lifetime and diffusion length are about 7 ms and 0.4 μm, respectively. The spin transport coherence length is enhanced by the electric field, leading to an enhancement in MR with increasing applied voltage.

Original language	English (US)
Article number	232507
Journal	Applied Physics Letters
Volume	95
Issue number	23
DOIs	https://doi.org/10.1063/1.3271772
State	Published - 2009

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Large magnetoresistance of thick polymer devices having La0.67 Sr0.33 MnO3 electrodes",

abstract = "We report magnetoresistance (MR) measurements for structures with micrometer-thick regioregular, polythiophene (rr-P3HT) polymer layers between two ferromagnetic contacts. Hole spin transport through the polymer layer leads to a relative MR value in 300 mT fields of 0.3% at 300 K and increasing to 18% at 25 K. The inferred intrinsic spin lifetime and diffusion length are about 7 ms and 0.4 μm, respectively. The spin transport coherence length is enhanced by the electric field, leading to an enhancement in MR with increasing applied voltage.",

author = "A. Ozbay and Nowak, {E. R.} and Yu, {Z. G.} and W. Chu and Yijian Shi and S. Krishnamurthy and Z. Tang and Nathan Newman",

note = "Funding Information: This work was supported by ONR under Contract No. N00014-07-C-0393. E.R.N. also acknowledges partial support by DOE under Award No. DE-FG02-07ER46374 and thanks G. Szulczewski for many stimulating discussions.",

year = "2009",

doi = "10.1063/1.3271772",

language = "English (US)",

volume = "95",

journal = "Applied Physics Letters",

issn = "0003-6951",

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TY - JOUR

T1 - Large magnetoresistance of thick polymer devices having La0.67 Sr0.33 MnO3 electrodes

AU - Ozbay, A.

AU - Nowak, E. R.

AU - Yu, Z. G.

AU - Chu, W.

AU - Shi, Yijian

AU - Krishnamurthy, S.

AU - Tang, Z.

AU - Newman, Nathan

N1 - Funding Information: This work was supported by ONR under Contract No. N00014-07-C-0393. E.R.N. also acknowledges partial support by DOE under Award No. DE-FG02-07ER46374 and thanks G. Szulczewski for many stimulating discussions.

PY - 2009

Y1 - 2009

N2 - We report magnetoresistance (MR) measurements for structures with micrometer-thick regioregular, polythiophene (rr-P3HT) polymer layers between two ferromagnetic contacts. Hole spin transport through the polymer layer leads to a relative MR value in 300 mT fields of 0.3% at 300 K and increasing to 18% at 25 K. The inferred intrinsic spin lifetime and diffusion length are about 7 ms and 0.4 μm, respectively. The spin transport coherence length is enhanced by the electric field, leading to an enhancement in MR with increasing applied voltage.

AB - We report magnetoresistance (MR) measurements for structures with micrometer-thick regioregular, polythiophene (rr-P3HT) polymer layers between two ferromagnetic contacts. Hole spin transport through the polymer layer leads to a relative MR value in 300 mT fields of 0.3% at 300 K and increasing to 18% at 25 K. The inferred intrinsic spin lifetime and diffusion length are about 7 ms and 0.4 μm, respectively. The spin transport coherence length is enhanced by the electric field, leading to an enhancement in MR with increasing applied voltage.

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DO - 10.1063/1.3271772

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Large magnetoresistance of thick polymer devices having La_0.67 Sr_0.33 MnO₃ electrodes

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