The Influence of a Heysler Ferromagnetic Alloy Film on the Spread of Surface Acoustic Waves

Michael M. Karpuk 1Dmitriy A. Kostiuk 2Yuri A. Kuzavko 3Vladimir G. Shavrov 4

1. Technical University of Koszalin, Raclawicka 15-17, Koszalin, Poland
2. Brest State Technical University, Brest 224017, Belarus
3. Belarusian State Agrarian Technical University (BATU), Minsk 220023, Belarus
4. Institute of Radio Engineering and Electronics RAS (IRE RAS), Mokhovaya, 11, Moscow 125009, Russian Federation

Spread of surface acoustic waves (SAW) of Rayleigh and SH-modes is examined on the surface medium of (100) and (110) orientations of the cubic crystal (Si, AsGa, etc.) covered with thin (much thinner than SAW wavelength) film of Heysler ferromagnetic alloy (HFA) with shape memory (SM). A 2-partial Rayleigh SAW spreads on the clear (100) cut of a crystal in a sagittal section and a volumetric transverse wave, a SH-mode, also does. A generalized 3-partial Rayleigh SAW spreads on a (110) cut at arbitrary wave vector k orientation, and only at k || [110] and k || [111] there are spoken above SAW.

Film coating with HFA with SM wasn't previously examined from the point of view of SAW spread. Let us note that longitudinal wave (LA) speeds in volumetric Ni2MnGa HFA are vl=5540 m/s, fast transverse (TA1) v1t=3560 m/s and slow one (TA2) v2t=740 m/s at spread along the k || [110] axis with e || [1T0] polarization. Measured speed changes at Ni2MnGa PT are about Δvl1.5%, Δv1t8%, and Δv2t40% respectfully and under external magnetic field at HFA saturation they are Δvl0.2%, Δv1t0.3% and Δv2t1%. We have measured 6% vl change in polycrystalline Ni2.14Mn0.81Fe0.05Ga sample (TMA=40oC) at change from paramagnetic phase to a low-temperature martensitic one. Ni53Mn25Ga22 of 3.83x4.06x9.93 mm3 with combined magnetostructural PT (TMA=105oC) also had 6% at such PT. At HFA film thickness of 0.01 wavelengths there is maximum sensitivity of 0.001o temperature, 1 Oe magnetic field and 1 Pa pressure measurements at 1 Hz stability of the device operation.

Legal notice
  • Legal notice:

    Copyright (c) Pielaszek Research, all rights reserved.
    The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
    In every case, proper references including Author(s) name(s) and URL of this webpage: must be provided.


Related papers
  1. Acousto-electronic Intellectual Sensors Based on Surface Waves
  2. Amplification of evanescent acoustic waves by the layer of 2D magnetic composite
  3. The investigation of longitudinal acoustic waves in Heusler Ni53Mn25Ga22 alloy crystal with coupled magnetostructural transition
  4. The surface waves acoustoelectronic sensors based on films of Heusler alloy
  5. The acoustical spectral investigations of a ferromagnet Heusler Ni53Mn25Ga22 alloy crystal
  6. Surface waves in nanofilms of Heysler ferromagnetic alloy
  7. Magnetodeformations influence on spin-electron transport in nanofilms
  8. Acoustic Spectrum of Nanoparticles of a Heysler Shape Memory Ferromagnetic Alloy
  9. Photonic effect in ferromagnetic nano-films of Heysler alloy
  10. The acoustical investigations of a Ni53Mn25Ga22 Heysler alloy ferromagnet crystal
  13. Phase Transitions in Novel Ferromagnetic Shape Memory Alloys Ni-Mn-Sn
  14. Acoustical properties and acoustopseudoplastic effects in ferromagnetic shape memory alloy NiMnFeGa
  15. Martensitic transition in strong magnetic field and external stress in quaternary ferromagnetic shape memory alloy Ni-Mn-Fe-Ga
  16. Magnetocaloric effect in Ni2.19Mn0.81Ga Heusler alloy

Presentation: Oral at E-MRS Fall Meeting 2009, Symposium F, by Yuri A. Kuzavko
See On-line Journal of E-MRS Fall Meeting 2009

Submitted: 2009-05-11 09:05
Revised:   2009-06-30 21:01
© 1998-2021 pielaszek research, all rights reserved Powered by the Conference Engine