Visualization of magnetostructural transition in Heusler alloys by Magnetic Force Microscopy

被引:1
作者
Geydt, Pavel [1 ]
Rodionov, Igor D. [2 ]
Granovsky, Alexander B. [2 ]
Soboleva, Ekaterina [1 ]
Fadeev, Egor [1 ]
Titov, Ivan S. [2 ,3 ]
Dubenko, Igor [4 ]
Lahderanta, Erkki [1 ]
机构
[1] LUT, Sch Engn Sci, Lappeenranta 53850, Finland
[2] Lomonosov Moscow State Univ MSU, Fac Phys, Moscow 119991, Russia
[3] Univ Luxembourg, Phys & Mat Sci Res Unit, L-4365 Luxembourg, Luxembourg
[4] Southern Illinois Univ, Dept Phys, Carbondale, IL 62901 USA
来源
MOSCOW INTERNATIONAL SYMPOSIUM ON MAGNETISM (MISM 2017) | 2018年 / 185卷
关键词
D O I
10.1051/epjconf/201818505004
中图分类号
O59 [应用物理学];
学科分类号
摘要
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 degrees C. The mechanism behind the observed transition is proposed.
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