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Physical limits of hyperthermia using magnetite fine particles
Abstract
Structural and magnetic properties of fine particles of magnetite are investigated with respect to the application for hyperthermia. Magnetic hysteresis losses are measured in dependence on the field amplitude for selected commercial powders and are discussed in terms of grain size and structure of the particles. For ferromagnetic powders as well as for ferrofluids, results of heating experiments within organic gels in a magnetic high frequency field are reported. The heating effect depends strongly on the magnetic properties of the magnetite particles which may vary appreciably for different samples in dependence on the particle size and microstructure. In particular, the transition from ferromagnetic to superparamagnetic behavior causes changes of the loss mechanism, and accordingly, of the heating effect. The maximum attainable heating effect is discussed in terms of common theoretical models. Rise of temperature at the surface of a small heated sample as well as in its immediate neighborhood in the surrounding medium is measured in dependence on time and is compared with solutions of the corresponding heat conductivity problem. Conclusions with respect to clinical applications are given.
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Cited by
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Diverse Applications of Nanomedicine
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Laurent, S., Dutz, S., Häfeli, U. O., & Mahmoudi, M. (2011) · Advances in Colloid and Interface Science · doi:10.1016/j.cis.2011.04.003 · Cited by 1,326
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Metadata
- Authors
- Hergt, R., Andra, W., d'Ambly, C. G., Hilger, I., Kaiser, W. A., Richter, U., & Schmidt, H.-G.
- Venue
- IEEE Transactions on Magnetics
- Published
- 1998
- Volume
- 34
- Issue
- 5
- Pages
- 3745-3754
- ISSN
- 0018-9464 (ISSN-L)
- OpenAlex
- W2131544387
- Cited by
- 658
- References
- 0
- FWCI
- 2.17
- Type
- journal article
- Language
- en
- Open access
- closed
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- Hergt, R., Andra, W., d'Ambly, C. G., Hilger, I., Kaiser, W. A., Richter, U., & Schmidt, H.-G. (1998). Physical limits of hyperthermia using magnetite fine particles. IEEE Transactions on Magnetics. https://doi.org/10.1109/20.718537
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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