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

Результат исследования: Научные публикации в периодических изданияхстатья по материалам конференциирецензирование

Аннотация

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.

Язык оригиналаанглийский
Номер статьи05004
ЖурналEPJ Web of Conferences
Том185
DOI
СостояниеОпубликовано - 4 июл 2018
Опубликовано для внешнего пользованияДа
Событие2017 Moscow International Symposium on Magnetism, MISM 2017 - Moscow, Российская Федерация
Продолжительность: 1 июл 20175 июл 2017

Предметные области OECD FOS+WOS

  • 1.03 ФИЗИЧЕСКИЕ НАУКИ И АСТРОНОМИЯ

ГРНТИ

  • 29.19 Физика твердых тел

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