Optimizing hysteretic power loss of magnetic ferrite nanoparticles

This thesis seeks to correlate hysteretic power loss of tertiary ferrite nanoparticles in alternating magnetic fields to trends predicted by physical models. By employing integration of hysteresis loops simulated from physical models for single-domain ferromagnets, we have identified ferrite materials optimal for remote heating. Several organometallic thermal decomposition methods were adapted to synthesize nanoparticles with anisotropy energies varying over 3 orders of magnitude and transferred into water using a high-temperature ligand exchange protocol. Furthermore, we compare nanoparticles of the same composition and size produced via different synthesis conditions and highlight differences in their materials properties. These analyses identify the synthesis conditions that yield nanoparticles with optimized magnetic properties and with some of the highest power dissipation (specific loss power) found in literature for tertiary ferrite materials.

Department dc:contributor.department

Massachusetts Institute of Technology. Department of Materials Science and Engineering.

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2013

Author dc:creator

• Chen, Ritchie

Advisor dc:contributor.advisor

• Polina Anikeeva.

• Materials Science and Engineering.

Statement dc:rights

• M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission.

Licence dc:rights.uri

• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

eng

Handle dc:identifier.uri

http://hdl.handle.net/1721.1/81064

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/81064