INTERPARTICLE MAGNETIC INTERACTIONS WITHIN A SINGLE DOMAIN MAGNETITE POWDER
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F15%3A86093915" target="_blank" >RIV/61989100:27360/15:86093915 - isvavai.cz</a>
Alternative codes found
RIV/61989100:27350/15:86093915 RIV/61989100:27740/15:86093915
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
INTERPARTICLE MAGNETIC INTERACTIONS WITHIN A SINGLE DOMAIN MAGNETITE POWDER
Original language description
The contribution presents interparticle magnetic interactions in dry ferrimagnetic single domain magnetite powder (the size of crystals being less than 50 nm) and in magnetite/magnesium oxide mixture powder (75 %, 50 % and 25 % of magnetite), where diamagnetic MgO powder is composed of micrometric grains. The study of magnetization of magnetite nanoparticles in diamagnetic matrices was motivated by similar structures discovered in biological systems. Intensity of interparticle interactions was measured using vibrating sample magnetometer Microsense EV9 and characterized by magnetization parameter Delta M = M-vir -0.5(M-up + M-down) in Henkel plots, where Mvir is value of virgin curve, and Mup and Mdown are values of magnetization in positive external fields of magnetization curve. Pure magnetite powder exhibits typical negative (dipolar) interactions with the minimum of about 0.02 T at 20 degrees C, while at lower temperatures the interactions are stronger. Consequently, at temperature of -140 degrees C the peak value moves up to 0.03 T.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach
Others
Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
NANOCON 2014: 6th International Conference, November 5th-7th 2014, Hotel Voronez I, Brno, Czech Republic, EU
ISBN
978-80-87294-53-6
ISSN
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e-ISSN
neuvedeno
Number of pages
6
Pages from-to
772-777
Publisher name
Tanger
Place of publication
Ostrava
Event location
Brno
Event date
Nov 5, 2014
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000350636300132