A4 Conference proceedings

Visualization of magnetostructural transition in Heusler alloys by Magnetic Force Microscopy


Open Access publication

Publication Details
Authors: Geydt Pavel, Rodionov Igor D., Granovsky Aleksander B., Soboleva Ekaterina, Fadeev Egor, Titov Ivan S., Dubenko Igor, Lähderanta Erkki
Publisher: EDP Sciences: EPJ Open Access / EDP Sciences
Publication year: 2018
Language: English
Related Journal or Series Information: EPJ Web of Conferences
Title of parent publication: Moscow International Symposium on Magnetism (MISM 2017)
Volume number: 185
Issue number: 05004
Start page: 1
End page: 4
Number of pages: 4
ISSN: 2101-6275
eISSN: 2100-014X
JUFO-Level of this publication: 1
Open Access: Open Access publication

Abstract

Magnetostructural transition was observed in Ni-Mn-In-Cr Heusler alloy with help of Magnetic Force Microscopy (MFM). The crystal structure of a sample and characteristic temperatures of the phase transition were controlled by roentgenostructural phase analysis and magnetometry, respectively. It appeared prominently important to prepare the surface of the sample until the nanometer level of surface roughness. Magnetic study performed with scanning probe microscope revealed existence of magnetic domains, which were spread across the surface evenly. Further studies revealed that intensity of magnetic signal decreases as fading out of the contrast of the MFM images. It was found that location of domains shifted after the heating/cooling cycle above Curie temperature for the studied alloy. Location of new domain walls appeared correlating with surface scrapings and defects, whilst it became independent from those after heating until just 70°C. The mechanism behind the observed transition is proposed.


Last updated on 2019-13-03 at 12:00