Bachelor's Thesis
Magnetic force microscopy and transport properties of metamagnetic nanostructures
Final Thesis 7.6 MBAuthor of thesis: Ing. Jiří Jaskowiec
Acad. year: 2016/2017
Supervisor: Ing. Vojtěch Uhlíř, Ph.D.
Reviewer: Ing. Marek Vaňatka, Ph.D.
Abstract:Iron-rhodium (FeRh) is a material featuring a first-order phase transition between antiferomagnetic (AF) and feromagnetic (FM) phases. The phase transition is symmetric with respect to the direction of transition in bulk FeRh and FeRh thin films. The bachelor thesis focuses on the properties of mesostructures of sub-micron size, where asymmetry between the AF-FM and FM-AF transitions has been recently discovered using electrical transport measurements dependent on temperature. The phase domain structure of FeRh mesostructures during the phase transition is visualized by magnetic force microscopy (MFM) in an out-of-plane magnetic field. Quantitative analysis of the measured magnetic signal reveals the effect of structure size on supercooling of the FM phase and abrupt increase of the AF phase during the FM-AF transition.
iron-rhodium, phase transition, magnetic force microscopy, antiferromagnetism, ferromagnetism
Date of defence
09.06.2017
Result of the defence
Defended (thesis was successfully defended)
Grading
A
Language of thesis
Czech
Faculty
Department
Study programme
Applied Sciences in Engineering (B3A-P)
Field of study
Physical Engineering and Nanotechnology (B-FIN)
Composition of Committee
prof. RNDr. Tomáš Šikola, CSc. (předseda)
prof. RNDr. Miroslav Liška, DrSc. (místopředseda)
prof. RNDr. Bohumila Lencová, CSc. (člen)
prof. RNDr. Petr Dub, CSc. (člen)
prof. RNDr. Radim Chmelík, Ph.D. (člen)
prof. RNDr. Jiří Spousta, Ph.D. (člen)
doc. Ing. Radek Kalousek, Ph.D. (člen)
prof. RNDr. Pavel Zemánek, Ph.D. (člen)
RNDr. Antonín Fejfar, CSc. (člen)
Supervisor’s report
Ing. Vojtěch Uhlíř, Ph.D.
Grade proposed by supervisor: A
Reviewer’s report
Ing. Marek Vaňatka, Ph.D.
Grade proposed by reviewer: A