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15 Sep 2009

Volume 106, Issue 6, Articles (06xxxx)

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J. Appl. Phys. 106, 061101 (2009); http://dx.doi.org/10.1063/1.3216463 (14 pages)

Carolyn A. Koh, Amadeu K. Sum, and E. Dendy Sloan
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Optimization of (Gd)5Si4 based materials: A step toward self-controlled hyperthermia applications

S. N. Ahmad and S. A. Shaheen

J. Appl. Phys. 106, 064701 (2009); http://dx.doi.org/10.1063/1.3190556 (7 pages) | Cited 1 time

Online Publication Date: 18 September 2009

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Structural and magnetic properties have been studied across the Gd5(Si1−xGex)4 and (Gd1−xRx)5Si4 series, with R = Ce Nd, Er, and Ho, in the context of their use as ferromagnetic materials in the self-controlled hyperthermia treatment of cancer. The study shows that these materials have high magnetization values and their magnetic ordering temperatures (TC) can be varied linearly over a broad range by adjusting the composition of the constituent elements. The magnetization values of these materials are close to the bulk value of α-Fe and are substantially higher than other transition metal and Fe based magnetic materials, e.g., oxide and ferrites. The high magnetization and optimality of TC values for self-controlled hyperthermia applications observed in these materials distinguish them as magnetic material of choice for such applications.
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87.50.ct Therapeutic applications
87.19.Pp Biothermics and thermal processes in biology
75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects
75.50.Dd Nonmetallic ferromagnetic materials
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