Magnetic properties of ultrathin CO/Pt multilayer Hall devices irradiated using focused ion beam

K. Wang; Y. Huang; Y. Z. Qiu; R. F. Chen; P. Heard; S. Bending

doi:10.1016/j.physb.2015.03.024

Magnetic properties of ultrathin CO/Pt multilayer Hall devices irradiated using focused ion beam

K. Wang, Y. Huang, Y. Z. Qiu, R. F. Chen, P. Heard, S. Bending

Department of Physics

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Abstract

A ferromagnetic Co/Pt multilayer was lithographically patterned into 10-μm-wide Hall devices. The anisotropy of the fabricated devices was modified using focused ion beam (FIB). Extraordinary Hall effect (EHE) measurements reveal pronounced reduction in nucleation field of the perpendicular loops at room temperature. At low temperature of 4.2 K reduced remanent ratios in EHE loops were observed, indicating a tilting of easy magnetic axis. The canting magnetization can be explained by an increasing magnetic moment at low temperatures and a reduced anisotropy by irradiation. The aperture angles were estimated to be in the range of 20–32° at 4.2 K. The aperture angle of the easy cone of magnetization was found to increase with doses at low temperatures.

Original language	English
Pages (from-to)	158-160
Journal	Physica B Condensed Matter
Volume	476
Early online date	27 Mar 2015
DOIs	https://doi.org/10.1016/j.physb.2015.03.024
Publication status	Published - 1 Nov 2015

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10.1016/j.physb.2015.03.024

Revised Full Physica B-Magnetic properties of ultrathin CoPt multilayerAccepted author manuscript, 391 KBLicence: CC BY-NC-ND

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title = "Magnetic properties of ultrathin CO/Pt multilayer Hall devices irradiated using focused ion beam",

abstract = "A ferromagnetic Co/Pt multilayer was lithographically patterned into 10-μm-wide Hall devices. The anisotropy of the fabricated devices was modified using focused ion beam (FIB). Extraordinary Hall effect (EHE) measurements reveal pronounced reduction in nucleation field of the perpendicular loops at room temperature. At low temperature of 4.2 K reduced remanent ratios in EHE loops were observed, indicating a tilting of easy magnetic axis. The canting magnetization can be explained by an increasing magnetic moment at low temperatures and a reduced anisotropy by irradiation. The aperture angles were estimated to be in the range of 20–32° at 4.2 K. The aperture angle of the easy cone of magnetization was found to increase with doses at low temperatures.",

author = "K. Wang and Y. Huang and Qiu, {Y. Z.} and Chen, {R. F.} and P. Heard and S. Bending",

year = "2015",

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doi = "10.1016/j.physb.2015.03.024",

language = "English",

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journal = "Physica B Condensed Matter",

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T1 - Magnetic properties of ultrathin CO/Pt multilayer Hall devices irradiated using focused ion beam

AU - Wang, K.

AU - Huang, Y.

AU - Qiu, Y. Z.

AU - Chen, R. F.

AU - Heard, P.

AU - Bending, S.

PY - 2015/11/1

Y1 - 2015/11/1

N2 - A ferromagnetic Co/Pt multilayer was lithographically patterned into 10-μm-wide Hall devices. The anisotropy of the fabricated devices was modified using focused ion beam (FIB). Extraordinary Hall effect (EHE) measurements reveal pronounced reduction in nucleation field of the perpendicular loops at room temperature. At low temperature of 4.2 K reduced remanent ratios in EHE loops were observed, indicating a tilting of easy magnetic axis. The canting magnetization can be explained by an increasing magnetic moment at low temperatures and a reduced anisotropy by irradiation. The aperture angles were estimated to be in the range of 20–32° at 4.2 K. The aperture angle of the easy cone of magnetization was found to increase with doses at low temperatures.

AB - A ferromagnetic Co/Pt multilayer was lithographically patterned into 10-μm-wide Hall devices. The anisotropy of the fabricated devices was modified using focused ion beam (FIB). Extraordinary Hall effect (EHE) measurements reveal pronounced reduction in nucleation field of the perpendicular loops at room temperature. At low temperature of 4.2 K reduced remanent ratios in EHE loops were observed, indicating a tilting of easy magnetic axis. The canting magnetization can be explained by an increasing magnetic moment at low temperatures and a reduced anisotropy by irradiation. The aperture angles were estimated to be in the range of 20–32° at 4.2 K. The aperture angle of the easy cone of magnetization was found to increase with doses at low temperatures.

UR - http://dx.doi.org/10.1016/j.physb.2015.03.024

UR - http://linkinghub.elsevier.com/retrieve/pii/S0921452615001532

U2 - 10.1016/j.physb.2015.03.024

DO - 10.1016/j.physb.2015.03.024

M3 - Article

SN - 0921-4526

VL - 476

SP - 158

EP - 160

JO - Physica B Condensed Matter

JF - Physica B Condensed Matter

ER -

Magnetic properties of ultrathin CO/Pt multilayer Hall devices irradiated using focused ion beam

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Current - Driven Domain Wall Motion in Artificial Magnetic Domain Structures

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Magnetic properties of ultrathin CO/Pt multilayer Hall devices irradiated using focused ion beam

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Current - Driven Domain Wall Motion in Artificial Magnetic Domain Structures

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