Hysteretic magnetoresistance in polymeric diodes

Sayani Majumdar, Himadri S. Majumdar, Harri Aarnio, Ronald Osterbacka

Research output: Contribution to journalArticleScientificpeer-review

15 Citations (Scopus)

Abstract

We report on hysteretic organic magnetoresistance (OMAR) in polymeric diodes. We found that magnitude and lineshape of OMAR depend strongly on the scan speed of the magnetic field and on the time delay between two successive measurements. The time‐dependent OMAR phenomenon is universal for diodes made with various polymers. However, the width and magnitude of OMAR varied with the polymeric material. The suggestive reason for this hysteretic behavior is trapped carriers, which in presence of a magnetic field change the ferromagnetic ground‐state of the polymer leading to a long spin relaxation time. These experimental observations are significant for clarification of the OMAR phenomenon.
Original languageEnglish
Pages (from-to)242-244
JournalPhysica Status Solidi: Rapid Research Letters
Volume3
Issue number7-8
DOIs
Publication statusPublished - 2009
MoE publication typeA1 Journal article-refereed

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Magnetoresistance
Diodes
diodes
polymers
magnetic fields
time lag
relaxation time
Polymers
Magnetic fields
Relaxation time
Time delay

Cite this

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title = "Hysteretic magnetoresistance in polymeric diodes",
abstract = "We report on hysteretic organic magnetoresistance (OMAR) in polymeric diodes. We found that magnitude and lineshape of OMAR depend strongly on the scan speed of the magnetic field and on the time delay between two successive measurements. The time‐dependent OMAR phenomenon is universal for diodes made with various polymers. However, the width and magnitude of OMAR varied with the polymeric material. The suggestive reason for this hysteretic behavior is trapped carriers, which in presence of a magnetic field change the ferromagnetic ground‐state of the polymer leading to a long spin relaxation time. These experimental observations are significant for clarification of the OMAR phenomenon.",
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Hysteretic magnetoresistance in polymeric diodes. / Majumdar, Sayani; Majumdar, Himadri S.; Aarnio, Harri; Osterbacka, Ronald.

In: Physica Status Solidi: Rapid Research Letters, Vol. 3, No. 7-8, 2009, p. 242-244.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Hysteretic magnetoresistance in polymeric diodes

AU - Majumdar, Sayani

AU - Majumdar, Himadri S.

AU - Aarnio, Harri

AU - Osterbacka, Ronald

PY - 2009

Y1 - 2009

N2 - We report on hysteretic organic magnetoresistance (OMAR) in polymeric diodes. We found that magnitude and lineshape of OMAR depend strongly on the scan speed of the magnetic field and on the time delay between two successive measurements. The time‐dependent OMAR phenomenon is universal for diodes made with various polymers. However, the width and magnitude of OMAR varied with the polymeric material. The suggestive reason for this hysteretic behavior is trapped carriers, which in presence of a magnetic field change the ferromagnetic ground‐state of the polymer leading to a long spin relaxation time. These experimental observations are significant for clarification of the OMAR phenomenon.

AB - We report on hysteretic organic magnetoresistance (OMAR) in polymeric diodes. We found that magnitude and lineshape of OMAR depend strongly on the scan speed of the magnetic field and on the time delay between two successive measurements. The time‐dependent OMAR phenomenon is universal for diodes made with various polymers. However, the width and magnitude of OMAR varied with the polymeric material. The suggestive reason for this hysteretic behavior is trapped carriers, which in presence of a magnetic field change the ferromagnetic ground‐state of the polymer leading to a long spin relaxation time. These experimental observations are significant for clarification of the OMAR phenomenon.

U2 - 10.1002/pssr.200903193

DO - 10.1002/pssr.200903193

M3 - Article

VL - 3

SP - 242

EP - 244

JO - Physica Status Solidi: Rapid Research Letters

JF - Physica Status Solidi: Rapid Research Letters

SN - 1862-6254

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