Interaction effects enhancing magnetic particle detection based on magneto-relaxometry

TY - JOUR

T1 - Interaction effects enhancing magnetic particle detection based on magneto-relaxometry

AU - Laslett, O.

AU - Ruta, S.

AU - Barker, J.

AU - Chantrell, R. W.

AU - Friedman, G.

AU - Hovorka, O.

PY - 2015/1/5

Y1 - 2015/1/5

N2 - We investigated the effects of dipolar interactions on the long-time magnetization decay M(t) in clusters of magnetic nanoparticles. Applying the Néel-Arrhenius thermal activation picture shows that M(t) generally follows stretched exponential behavior, dependent not only on the dipolar interaction strength, geometry of particle arrangement within clusters, but also on the field history applied during the initialization. As demonstrated, combining these factors could serve to enhance the degree of resolution in magnetic particle detection based on magneto-relaxometry.

AB - We investigated the effects of dipolar interactions on the long-time magnetization decay M(t) in clusters of magnetic nanoparticles. Applying the Néel-Arrhenius thermal activation picture shows that M(t) generally follows stretched exponential behavior, dependent not only on the dipolar interaction strength, geometry of particle arrangement within clusters, but also on the field history applied during the initialization. As demonstrated, combining these factors could serve to enhance the degree of resolution in magnetic particle detection based on magneto-relaxometry.

UR - http://www.scopus.com/inward/record.url?scp=84923773084&partnerID=8YFLogxK

U2 - 10.1063/1.4905339

DO - 10.1063/1.4905339

M3 - Article

AN - SCOPUS:84923773084

SN - 0003-6951

VL - 106

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 1

M1 - 012407

ER -