TY - JOUR
T1 - Effect of Frequency and Field Amplitude in Magnetic Hyperthermia
AU - Roca, A. G.
AU - Wiese, B.
AU - Timmis, J.
AU - Vallejo-Fernandez, G.
AU - O'Grady, K.
PY - 2012/11
Y1 - 2012/11
N2 - We have undertaken studies of the heating rate in three sets of magnetic nanoparticles for their application in magnetic hyperthermia. The nanoparticles were magnetite-maghemite with average particle diameters of 5, 28, and 45 nm, respectively. All samples were synthesized in an aqueous media and have a narrow size distribution. These sizes represent particles which are single domain, particles which lie close to the single domain multi-domain boundary, and particles which are probably multidomain. The heating rate is greater for the largest particles when an alternating magnetic field of 250 Oe and a frequency of 110 kHz are applied. The significant increase in heating for the 45 nm particles suggests that heating may be associated with particle rotation.
AB - We have undertaken studies of the heating rate in three sets of magnetic nanoparticles for their application in magnetic hyperthermia. The nanoparticles were magnetite-maghemite with average particle diameters of 5, 28, and 45 nm, respectively. All samples were synthesized in an aqueous media and have a narrow size distribution. These sizes represent particles which are single domain, particles which lie close to the single domain multi-domain boundary, and particles which are probably multidomain. The heating rate is greater for the largest particles when an alternating magnetic field of 250 Oe and a frequency of 110 kHz are applied. The significant increase in heating for the 45 nm particles suggests that heating may be associated with particle rotation.
UR - http://www.scopus.com/inward/record.url?scp=84867772165&partnerID=8YFLogxK
U2 - 10.1109/TMAG.2012.2201459
DO - 10.1109/TMAG.2012.2201459
M3 - Article
SN - 0018-9464
VL - 48
SP - 4054
EP - 4057
JO - IEEE Transactions on Magnetics
JF - IEEE Transactions on Magnetics
IS - 11
M1 - 6332604
ER -