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Title:Magnetne lastnosti sistemov maghemitnih nanodelcev
Authors:ID Gregor, Filip (Author)
ID Jagodič, Marko (Mentor) More about this mentor... New window
Files:.pdf UNI_Gregor_Filip_2012.pdf (1,16 MB)
MD5: 1E88DD0D588BBBD89A0F5435A427A206
PID: 20.500.12556/dkum/ec3cf7e2-ee2b-4d23-a3e7-cea47199ab1c
 
Language:Slovenian
Work type:Final seminar paper
Typology:2.11 - Undergraduate Thesis
Organization:FNM - Faculty of Natural Sciences and Mathematics
Abstract:V seminarju obravnavamo magnetne lastnosti sistemov maghemitnih nanodelcev. Meritve magnetne susceptibilnost, AC meritve in meritve magnetizacijske krivulje smo opravili na vzorcih z različnimi masnimi deleži maghemitnih nanodelcev, dispergiranih v vosku. Za analizo meritev smo uporabili Néelov model, ki velja za sisteme brez dipolnih interakcij med nanodelci, in Vogel - Fulcherjev model, ki velja za sisteme s šibkimi dipolnimi interakcijami. Iz analize meritev smo določili efektivno anizotropijsko konstanto in saturacijsko magnetizacijo nanodelcev, ter ocenili jakost dipolne interakcije med njimi.
Keywords:maghemitni nanodelci, Néelov model, Vogel - Fulcherjev model, dipolne interakcije, meritve magnetne susceptibilnosti, AC magnetne meritve, meritve magnetizacijske krivulje
Place of publishing:Maribor
Publisher:[F. Gregor]
Year of publishing:2012
PID:20.500.12556/DKUM-38604 New window
UDC:53(043.2)
COBISS.SI-ID:19466504 New window
NUK URN:URN:SI:UM:DK:M1TQQ5ZZ
Publication date in DKUM:03.02.2021
Views:1625
Downloads:69
Metadata:XML DC-XML DC-RDF
Categories:FNM
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Secondary language

Language:English
Title:Magnetic properties of maghemite nanoparticle systems
Abstract:In this work we study the magnetic properties of maghemite nanoparticles. Measurements of magnetic susceptibility, AC measurements and magnetization measurements were performed on samples with different weight percentages of nanoparticles dispersed in wax. For the analysis of the sample without dipolar interactions we used Néel's model. In the case of samples with small dipole interactions we applied the Vogel-Fulcker model. From the analysis we were able to obtain the effective anisotropy constant and the saturation magnetization of nanoparticles. Furthermore, we estimated the strength of dipole interactions between nanoparticles.
Keywords:maghemite nanoparticles, Néel model, Vogel - Fulcher model, dipole interactions, magnetic susceptibility measurements, AC magnetic measurements, magnetization measurements


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