Ferromagnetic glass-coated microwires with good heating properties for magnetic hyperthermia

A Talaat; J Alonso; V Zhukova; E Garaio; J A García; H Srikanth; M H Phan; A Zhukov

doi:10.1038/srep39300

Ferromagnetic glass-coated microwires with good heating properties for magnetic hyperthermia

Sci Rep. 2016 Dec 19:6:39300. doi: 10.1038/srep39300.

Authors

A Talaat^{1

2

3}, J Alonso^{1

4}, V Zhukova^{2

3}, E Garaio⁵, J A García^{4

6}, H Srikanth¹, M H Phan¹, A Zhukov^{2

3

7}

Affiliations

¹ Department of Physics, University of South Florida, Tampa, FL 33620, USA.
² Dpto. Física de Materiales, UPV/EHU, 20018 San Sebastián, Spain.
³ Dpto. de Física Aplicada, EUPDS, UPV/EHU, 20018, San Sebastián, Spain.
⁴ BCMaterials Edificio N°. 500, Parque Tecnológico de Vizcaya, 48160, Derio, Bilbao, Spain.
⁵ Department of Electricity and Electronics, University of Basque Country, Leioa 48940, Spain.
⁶ Department of Applied Physics II, University of Basque Country, Leioa 48940, Spain.
⁷ IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain.

Abstract

The heating properties of Fe_71.7Si₁₁B_13.4Nb₃Ni_0.9 amorphous glass-coated microwires are explored for prospective applications in magnetic hyperthermia. We show that a single 5 mm long wire is able to produce a sufficient amount of heat, with the specific loss power (SLP) reaching a value as high as 521 W/g for an AC field of 700 Oe and a frequency of 310 kHz. The large SLP is attributed to the rectangular hysteresis loop resulting from a peculiar domain structure of the microwire. For an array of parallel microwires, we have observed an SLP improvement by one order of magnitude; 950 W/g for an AC field of 700 Oe. The magnetostatic interaction strength essential in the array of wires can be manipulated by varying the distance between the wires, showing a decreasing trend in SLP with increasing wire separation. The largest SLP is obtained when the wires are aligned along the direction of the AC field. The origin of the large SLP and relevant heating mechanisms are discussed.

Publication types

Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.