Zimmermann, Michael and Meier, Thomas Norbert Gerhard and Dirnberger, Florian and Kakay, Attila and Decker, Martin and Wintz, Sebastian and Finizio, Simone and Josten, Elisabeth and Raabe, Joerg and Kronseder, Matthias and Bougeard, Dominique and Lindner, Juergen and Back, Christian Horst (2018) Origin and Manipulation of Stable Vortex Ground States in Permalloy Nanotubes. NANO LETTERS, 18 (5). pp. 2828-2834. ISSN 1530-6984, 1530-6992
Full text not available from this repository. (Request a copy)Abstract
We present a detailed study on the static magnetic properties of individual permalloy nanotubes (NTs) with hexagonal cross-sections. Anisotropic magnetoresistance (AMR) measurements and scanning transmission X-ray microscopy (STXM) are used to investigate their magnetic ground states and its stability. We find that the magnetization in zero applied magnetic field is in a very stable vortex state. Its origin is attributed to a strong growth-induced anisotropy with easy axis perpendicular to the long axis of the tubes. AMR measurements of individual NTs in combination with micromagnetic simulations allow the determination of the magnitude of the growth-induced anisotropy for different types of NT coatings. We show that the strength of the anisotropy can be controlled by introducing a buffer layer underneath the magnetic layer. The magnetic ground states depend on the external magnetic field history and are directly imaged using STXM. Stable vortex domains can be introduced by external magnetic fields and can be erased by radio-frequency magnetic fields applied at the center of the tubes via a strip line antenna.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ANISOTROPIC MAGNETORESISTANCE; MAGNETIC-ANISOTROPY; DOMAIN-WALLS; FILMS; IRON; DEPENDENCE; Nanotube; anisotropic magnetoresistance; permalloy; vortex; ground state |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Back > Group Christian Back |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 20 Feb 2020 10:00 |
| Last Modified: | 20 Feb 2020 10:00 |
| URI: | https://pred.uni-regensburg.de/id/eprint/14652 |
Actions (login required)
 |
View Item |
