Epitaxial Growths and Magnetization Dynamics of Ni2MnSn Heusler Alloy Films

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Dubowik, J (Author) Other; Goscianska, I (Author) Other; Zaleski, K (Author) Other; Glowinski, H (Author) Other; Ehresmann, A (Author) Other; G.N. Kakazei (Author) REIT; Bunyaev, SA (Author) FCUP

Journal

Title: Acta Physica Polonica A

Vol. 121

Pages: 1121-1123

ISSN: 0587-4246

Publisher: POLSKA AKADEMIA NAUK

Indexing

ISI Web of Knowledge - 12 Citations

Scopus - 13 Citations

Other information

Authenticus ID: P-002-ADM

DOI: 10.12693/aphyspola.121.1121

Abstract (EN): Ferromagnetic resonance has been investigated in Ni2MnSn Heusler alloy films. The films were deposited at 673 < T < 723 K on MgO(001) substrates by means of magnetron sputtering. X-ray diffraction confirmed that the films were epitaxial. The films had magnetic parameters typical of bulk Ni2MnSn with L2(1) structural order. From angular dependences of the resonance field and the ferromagnetic resonance linewidth the intrinsic Gilbert contribution and extrinsic contribution to the ferromagnetic resonance linewidth due to two-magnon scattering were separated. Our data indicate a room temperature Gilbert damping of 0.007, which is comparable to that of half-metallic Heusler alloy. Surface roughness is responsible for a substantial extrinsic two-magnon contribution to the linewidth of the order of 50-300 Oe in these epitaxial soft magnetic Hensler alloy films The spin wave stiffness of D = 70-100 meV angstrom(2) is one of the lowest for the known Hensler alloy.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 3