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

The heating properties of Fe 71.7Si 11B 13.4Nb 3Ni 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.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [6] ;  [6] ;  [7]
  1. Univ. of South Florida, Tampa, FL (United States); Polytechnic Univ. of Valencia (UPV) (Spain)
  2. Univ. of South Florida, Tampa, FL (United States); BCMaterials Edificio (Spain)
  3. Polytechnic Univ. of Valencia (UPV) (Spain)
  4. Univ. of Basque Country (Spain)
  5. BCMaterials Edificio (Spain); Univ. of Basque Country (Spain)
  6. Univ. of South Florida, Tampa, FL (United States)
  7. Polytechnic Univ. of Valencia (UPV) (Spain); Basque Foundation for Science, Bilbao (Spain)
Publication Date:
Grant/Contract Number:
FG02-07ER46438
Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Research Org:
Univ. of South Florida, Tampa, FL (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE
OSTI Identifier:
1361637