Influence of a transverse static magnetic field on the magnetic hyperthermia properties and high-frequency hysteresis loops of ferromagnetic FeCo nanoparticles
Abstract
The influence of a transverse static magnetic field on the magnetic hyperthermia properties is studied on a system of large-losses ferromagnetic FeCo nanoparticles. The simultaneous measurement of the high-frequency hysteresis loops and of the temperature rise provides an interesting insight into the losses and heating mechanisms. A static magnetic field of only 40 mT is enough to cancel the heating properties of the nanoparticles, a result reproduced using numerical simulations of hysteresis loops. These results cast doubt on the possibility to perform someday magnetic hyperthermia inside a magnetic resonance imaging setup.
- Publication:
-
Applied Physics Letters
- Pub Date:
- January 2012
- DOI:
- 10.1063/1.3681361
- arXiv:
- arXiv:1201.2536
- Bibcode:
- 2012ApPhL.100e2403M
- Keywords:
-
- biomagnetism;
- biomedical MRI;
- cobalt alloys;
- eddy current losses;
- ferromagnetic materials;
- high-frequency effects;
- hyperthermia;
- iron alloys;
- magnetic hysteresis;
- magnetic leakage;
- magnetic particles;
- nanomagnetics;
- nanoparticles;
- numerical analysis;
- thermomagnetic effects;
- thermomagnetic treatment;
- 87.19.Pp;
- 87.61.-c;
- 75.75.-c;
- 72.30.+q;
- 75.50.Bb;
- 75.60.Ej;
- Biothermics;
- Magnetic resonance imaging;
- High-frequency effects;
- plasma effects;
- Fe and its alloys;
- Magnetization curves hysteresis Barkhausen and related effects;
- Condensed Matter - Materials Science
- E-Print:
- 6 pages, 3 figures