SWR Studies of Higher-Order Surface Anisotropy Terms in (Ga,Mn)As Thin Films

• Authors: H. Puszkarski , P. Tomczak , H. Diep
• Languages of publication: EN

Abstracts

EN

We extend the theory of spin-wave resonance (SWR) by introducing a new formula representing the surface pinning parameter as a series of contributions from different anisotropies existing in (Ga,Mn)As thin films. Comparing our theory with the reported experimental studies of SWR in thin films of the ferromagnetic semiconductor (Ga,Mn)As, we find that besides the first-order cubic anisotropy, higher-order cubic anisotropies (in the second and third orders) as well as uniaxial anisotropies (perpendicular in the first and second orders, and in-plane diagonal) occur on the surface of this material. To our best knowledge this is the first report of the existence of higher-order surface anisotropy fields in (Ga,Mn)As thin films.

Keywords

EN

75.50.Pp; 76.50.+g; 75.70.-i; 75.30.Ds; 76.60.-k

Discipline

• 76.60.-k: Nuclear magnetic resonance and relaxation(see also 33.25.+k Nuclear resonance and relaxation in atomic and molecular physics and 82.56.-b Nuclear magnetic resonance in physical chemistry and chemical physics; for structure determination using magnetic resonance techniques, see 61.05.Qr; for biophysical applications, see 87.80.Lg; for NMR in superconducting materials, see 74.25.nj)
• 76.50.+g: Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance(see also 75.30.Ds Spin waves)
• 75.50.Pp: Magnetic semiconductors
• 75.30.Ds: Spin waves(for spin-wave resonance, see 76.50.+g)
• 75.70.-i: Magnetic properties of thin films, surfaces, and interfaces(for magnetic properties of nanostructures, see 75.75.-c)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2018
• Volume: 133
• Issue: 3
• Pages: 635-638

Dates

published

2018-03

Contributors

author

H. Puszkarski

• Surface Physics Division, Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

P. Tomczak

• Quantum Physics Division, Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

H. Diep

• Laboratoire de Physique Theéorique et Modélisation, Université de Cergy-Pontoise, CNRS, UMR 8089 2, Av. Adolphe Chauvin, 95302 Cergy-Pontoise Cedex, France

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Identifiers

DOI

10.12693/APhysPolA.133.635