Anisotropic magnetoresistance of individual CoFeB and Ni nanotubes with values of up to 1.4% at room temperature

Daniel Rüffer, Marlou Slot, Rupert Huber, Thomas Schwarze, Florian Heimbach, Gözde Tütüncüoglu, Federico Matteini, Eleonora Russo-Averchi, András Kovács, Rafal Dunin-Borkowski, Reza R. Zamani, Joan R. Morante, Jordi Arbiol, Anna Fontcuberta I Morral, Dirk Grundler

Research output: Contribution to journalReview articlepeer-review

30 Scopus citations

Abstract

Magnetic nanotubes (NTs) are interesting for magnetic memory and magnonic applications. We report magnetotransport experiments on individual 10 to 20 μ m long Ni and CoFeB NTs with outer diameters ranging from 160 to 390 nm and film thicknesses of 20 to 40 nm. The anisotropic magnetoresistance (AMR) effect studied from 2 K to room temperature (RT) amounted to 1.4% and 0.1% for Ni and CoFeB NTs, respectively, at RT. We evaluated magnetometric demagnetization factors of about 0.7 for Ni and CoFeB NTs having considerably different saturation magnetization. The relatively large AMR value of the Ni nanotubes is promising for RT spintronic applications. The large saturation magnetization of CoFeB is useful in different fields such as magnonics and scanning probe microscopy using nanotubes as magnetic tips.

Original languageEnglish
Article number076112
JournalAPL Materials
Volume2
Issue number7
DOIs
StatePublished - Jul 2014
Externally publishedYes

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