Magnetic Resonance Studies of the Fundamental Spin-Wave Modes in Individual Submicron Cu/NiFe/Cu Perpendicularly Magnetized Disks
Abstract
Spin-wave spectra of perpendicularly magnetized disks consisting of a 100 nm permalloy layer sandwiched between two Cu layers of 30 nm are measured individually by a magnetic resonance force microscope. Using 3D micromagnetic simulations, it is demonstrated that, for submicron-size diameters, the lowest energy spin-wave mode of the saturated state is not spatially uniform, but rather is localized at the center of the Py/Cu interfaces in the region of the minimum demagnetizing field.
- Publication:
-
Physical Review Letters
- Pub Date:
- March 2007
- DOI:
- 10.1103/PhysRevLett.98.127601
- arXiv:
- arXiv:cond-mat/0606245
- Bibcode:
- 2007PhRvL..98l7601D
- Keywords:
-
- 76.50.+g;
- 68.37.Rt;
- 75.30.Ds;
- 75.75.+a;
- Ferromagnetic antiferromagnetic and ferrimagnetic resonances;
- spin-wave resonance;
- Magnetic force microscopy;
- Spin waves;
- Magnetic properties of nanostructures;
- Condensed Matter - Materials Science
- E-Print:
- Physical Review letters 98 (23/03/2007) 127601