Effects of conjugated polymer on the magnetotransport properties in La0.7Sr0.3MnO3 ferromagnetic electrodes

M. Pesonen; S. Majumdar; H. Huhtinen; P. Paturi; Himadri Majumdar; R. Österbacka

doi:10.1063/1.4800907

Effects of conjugated polymer on the magnetotransport properties in La_0.7Sr_0.3MnO₃ ferromagnetic electrodes

M. Pesonen^*, S. Majumdar, H. Huhtinen, P. Paturi, Himadri Majumdar, R. Österbacka

^*Corresponding author for this work

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

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Abstract

Magnetotransport of La_0.7Sr_0.3MnO₃ (LSMO)/regioregular poly3-hexylthiophene (rr-P3HT) interfaces were studied at 5–300 K to gain insight of spin transport in polymer coated LSMO. LSMO films on SrTiO₃ (STO), MgO, and quartz substrates were characterized in pristine state, after depositing rr-P3HT and after removing rr-P3HT. Application and removal of rr-P3HT caused the disappearance of colossal magneto resistance and the emerging of low-field magnetoresistance (LFMR) in STO/LSMO, while the same treatment on MgO and quartz showed only a large LMFR signal with no significant changes during application and removal of rr-P3HT. This result signifies that epitaxial thin films of LSMO do not maintain their transport characteristics when coated with organic semiconductors, posing a limitation for efficient spin polarized injection at such interfaces.

Original language	English
Article number	042102
Journal	AIP Advances
Volume	3
Issue number	4
DOIs	https://doi.org/10.1063/1.4800907
Publication status	Published - 2013
MoE publication type	A1 Journal article-refereed

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title = "Effects of conjugated polymer on the magnetotransport properties in La0.7Sr0.3MnO3 ferromagnetic electrodes",

abstract = "Magnetotransport of La0.7Sr0.3MnO3 (LSMO)/regioregular poly3-hexylthiophene (rr-P3HT) interfaces were studied at 5–300 K to gain insight of spin transport in polymer coated LSMO. LSMO films on SrTiO3 (STO), MgO, and quartz substrates were characterized in pristine state, after depositing rr-P3HT and after removing rr-P3HT. Application and removal of rr-P3HT caused the disappearance of colossal magneto resistance and the emerging of low-field magnetoresistance (LFMR) in STO/LSMO, while the same treatment on MgO and quartz showed only a large LMFR signal with no significant changes during application and removal of rr-P3HT. This result signifies that epitaxial thin films of LSMO do not maintain their transport characteristics when coated with organic semiconductors, posing a limitation for efficient spin polarized injection at such interfaces.",

author = "M. Pesonen and S. Majumdar and H. Huhtinen and P. Paturi and Himadri Majumdar and R. {\"O}sterbacka",

year = "2013",

doi = "10.1063/1.4800907",

language = "English",

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journal = "AIP Advances",

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T1 - Effects of conjugated polymer on the magnetotransport properties in La0.7Sr0.3MnO3 ferromagnetic electrodes

AU - Pesonen, M.

AU - Majumdar, S.

AU - Huhtinen, H.

AU - Paturi, P.

AU - Majumdar, Himadri

AU - Österbacka, R.

PY - 2013

Y1 - 2013

N2 - Magnetotransport of La0.7Sr0.3MnO3 (LSMO)/regioregular poly3-hexylthiophene (rr-P3HT) interfaces were studied at 5–300 K to gain insight of spin transport in polymer coated LSMO. LSMO films on SrTiO3 (STO), MgO, and quartz substrates were characterized in pristine state, after depositing rr-P3HT and after removing rr-P3HT. Application and removal of rr-P3HT caused the disappearance of colossal magneto resistance and the emerging of low-field magnetoresistance (LFMR) in STO/LSMO, while the same treatment on MgO and quartz showed only a large LMFR signal with no significant changes during application and removal of rr-P3HT. This result signifies that epitaxial thin films of LSMO do not maintain their transport characteristics when coated with organic semiconductors, posing a limitation for efficient spin polarized injection at such interfaces.

AB - Magnetotransport of La0.7Sr0.3MnO3 (LSMO)/regioregular poly3-hexylthiophene (rr-P3HT) interfaces were studied at 5–300 K to gain insight of spin transport in polymer coated LSMO. LSMO films on SrTiO3 (STO), MgO, and quartz substrates were characterized in pristine state, after depositing rr-P3HT and after removing rr-P3HT. Application and removal of rr-P3HT caused the disappearance of colossal magneto resistance and the emerging of low-field magnetoresistance (LFMR) in STO/LSMO, while the same treatment on MgO and quartz showed only a large LMFR signal with no significant changes during application and removal of rr-P3HT. This result signifies that epitaxial thin films of LSMO do not maintain their transport characteristics when coated with organic semiconductors, posing a limitation for efficient spin polarized injection at such interfaces.

U2 - 10.1063/1.4800907

DO - 10.1063/1.4800907

M3 - Article

SN - 2158-3226

VL - 3

JO - AIP Advances

JF - AIP Advances

IS - 4

M1 - 042102

ER -

Effects of conjugated polymer on the magnetotransport properties in La0.7Sr0.3MnO3 ferromagnetic electrodes

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Effects of conjugated polymer on the magnetotransport properties in La_0.7Sr_0.3MnO₃ ferromagnetic electrodes