CPL - Chalmers Publication Library
| Utbildning | Forskning | Styrkeområden | Om Chalmers | In English In English Ej inloggad.

Tailoring the magnetodynamic properties of nanomagnets using magnetocrystalline and shape anisotropies

Vegard Flovik ; Ferran Macià ; Joan Manel Hernàndez ; Rimantas Bručas ; Maj Hanson (Institutionen för teknisk fysik) ; Erik Wahlström
Physical Review B. Condensed Matter and Materials Physics (1098-0121). Vol. 92 (2015), 10, p. art. no. 104406.
[Artikel, refereegranskad vetenskaplig]

Magnetodynamical properties of nanomagnets are affected by the demagnetizing fields created by the same nanoelements. In addition, magnetocrystalline anisotropy produces an effective field that also contributes to the spin dynamics. We show how the dimensions of magnetic elements can be used to balance crystalline and shape anisotropies, and that this can be used to tailor the magnetodynamic properties. We study ferromagnetic ellipses patterned from a 10-nm-thick epitaxial Fe film with dimensions ranging from 50×150 to 150×450 nm. The study combines ferromagnetic resonance (FMR) spectroscopy with analytical calculations and micromagnetic simulations, and proves that the dynamical properties can be effectively controlled by changing the size of the nanomagnets. We also show how edge defects in the samples influence the magnetization dynamics. Dynamical edge modes localized along the sample edges are strongly influenced by edge defects, and this needs to be taken into account in understanding the full FMR spectrum.



Denna post skapades 2015-10-06. Senast ändrad 2015-10-22.
CPL Pubid: 223702

 

Läs direkt!

Lokal fulltext (fritt tillgänglig)

Länk till annan sajt (kan kräva inloggning)


Institutioner (Chalmers)

Institutionen för teknisk fysik (1900-2015)

Ämnesområden

Fysik

Chalmers infrastruktur