Visualization of magnetostructural transition in Heusler alloys by Magnetic Force Microscopy

Pavel Geydt, Igor D. Rodionov, Alexander B. Granovsky, Ekaterina Soboleva, Egor Fadeev, Ivan S. Titov, Igor Dubenko, Erkki Lähderanta

Research output: Contribution to journalConference articlepeer-review


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.

Original languageEnglish
Article number05004
JournalEPJ Web of Conferences
Publication statusPublished - 4 Jul 2018
Externally publishedYes
Event2017 Moscow International Symposium on Magnetism, MISM 2017 - Moscow, Russian Federation
Duration: 1 Jul 20175 Jul 2017



State classification of scientific and technological information

  • 29.19 Physics of solids


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