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2015 | 127 | 2 | 514-516
Article title

Nuclear Magnetic Resonance in Hexaferrite/Maghemite Composite Nanoparticles

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Abstracts
EN
Due to their bio-compatibility and non-toxicity, ferrimagnetic iron oxides are suitable for various medical applications. In the case of hyperthermia, the promising approach how to reach desired magnetic properties is to combine more phases into a composite material. A series of samples containing maghemite and M-hexaferrite was prepared by sol-gel method with subsequent thermal treatment where annealing temperature and time were varied. The samples were characterized by X-ray diffraction. In this paper we focused mainly on application of nuclear magnetic resonance spectroscopy to investigate these strongly inhomogeneous nanoparticle composites. Frequency-swept ⁵⁷Fe NMR spectra of nanoparticle samples were measured in a zero external magnetic field at 4.2 K. Utilizing differences in optimal excitation field strengths and in relaxation times, we were able to resolve NMR signal assigned to hexagonal ferrite of M-phase from signal which showed features attributed to maghemite.
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Year
Volume
127
Issue
2
Pages
514-516
Physical description
Dates
published
2015-02
References
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Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv127n2115kz
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