Ferromagnetic glass-coated microwires with good heating properties for magnetic hyperthermia
- Univ. of South Florida, Tampa, FL (United States); Polytechnic Univ. of Valencia (UPV) (Spain)
- Univ. of South Florida, Tampa, FL (United States); BCMaterials Edificio (Spain)
- Polytechnic Univ. of Valencia (UPV) (Spain)
- Univ. of Basque Country (Spain)
- BCMaterials Edificio (Spain); Univ. of Basque Country (Spain)
- Univ. of South Florida, Tampa, FL (United States)
- Polytechnic Univ. of Valencia (UPV) (Spain); Basque Foundation for Science, Bilbao (Spain)
The heating properties of Fe71.7Si11B13.4Nb3Ni0.9 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.
- Research Organization:
- Univ. of South Florida, Tampa, FL (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- FG02-07ER46438
- OSTI ID:
- 1361637
- Journal Information:
- Scientific Reports, Vol. 6, Issue 1; ISSN 2045-2322
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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Magnetic and structural properties of glass-coated Heusler-type microwires exhibiting martensitic transformation
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