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

Research output: Contribution to journalArticle

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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 languageEnglish
Pages (from-to)158-160
JournalPhysica B Condensed Matter
Volume476
Early online date27 Mar 2015
DOIs
Publication statusPublished - 1 Nov 2015

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Focused ion beams
Carbon Monoxide
Magnetic properties
Multilayers
ion beams
magnetic properties
Hall effect
apertures
Magnetization
magnetization
anisotropy
Anisotropy
Temperature
cones
magnetic moments
Magnetic moments
nucleation
Cones
dosage
irradiation

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Magnetic properties of ultrathin CO/Pt multilayer Hall devices irradiated using focused ion beam. / Wang, K.; Huang, Y.; Qiu, Y. Z.; Chen, R. F.; Heard, P.; Bending, S.

In: Physica B Condensed Matter, Vol. 476, 01.11.2015, p. 158-160.

Research output: Contribution to journalArticle

Wang, K. ; Huang, Y. ; Qiu, Y. Z. ; Chen, R. F. ; Heard, P. ; Bending, S. / Magnetic properties of ultrathin CO/Pt multilayer Hall devices irradiated using focused ion beam. In: Physica B Condensed Matter. 2015 ; Vol. 476. pp. 158-160.
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