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Gyromagnetic effects in nanocomposit...

Corte-Real, Michelle Marissa.

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Gyromagnetic effects in nanocomposite soft magnetic films.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Gyromagnetic effects in nanocomposite soft magnetic films./
作者:	Corte-Real, Michelle Marissa.
面頁冊數:	97 p.
附註:	Source: Dissertation Abstracts International, Volume: 64-01, Section: B, page: 0264.
Contained By:	Dissertation Abstracts International64-01B.
標題:	Physics, Electricity and Magnetism. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoeng/servlet/advanced?query=3077871
ISBN:	0493984542

Gyromagnetic effects in nanocomposite soft magnetic films.
Corte-Real, Michelle Marissa.

Gyromagnetic effects in nanocomposite soft magnetic films. - 97 p.

Source: Dissertation Abstracts International, Volume: 64-01, Section: B, page: 0264.

Thesis (Ph.D.)--University of Delaware, 2003.

Nanocomposite films comprising Fe grains in a non-magnetic oxide matrix are of interest due to potential applications in high-frequency circuits. The small Fe grain size leads to an effective averaging of magneto-crystalline anisotropy, leading to soft magnetic properties. The high saturation magnetization (<italic>MS</italic>) of the Fe leads to high permeabilities, while the high resistance of the oxide matrix precludes eddy current damping at high frequencies. In the gyromagnetic frequency regime the domain wall motion is expected to be severely damped, allowing only coherent rotation. For systems with coherent rotation being the only mode of reversal, the permeability is governed by the Snoek Limit.

ISBN: 0493984542Subjects--Topical Terms:

1019535
Physics, Electricity and Magnetism.

Gyromagnetic effects in nanocomposite soft magnetic films.
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100 1 $a Corte-Real, Michelle Marissa. $3 1944603
245 1 0 $a Gyromagnetic effects in nanocomposite soft magnetic films.
300 $a 97 p.
500 $a Source: Dissertation Abstracts International, Volume: 64-01, Section: B, page: 0264.
500 $a Professor in charge: John Q. Xiao.
502 $a Thesis (Ph.D.)--University of Delaware, 2003.
520 $a Nanocomposite films comprising Fe grains in a non-magnetic oxide matrix are of interest due to potential applications in high-frequency circuits. The small Fe grain size leads to an effective averaging of magneto-crystalline anisotropy, leading to soft magnetic properties. The high saturation magnetization (<italic>MS</italic>) of the Fe leads to high permeabilities, while the high resistance of the oxide matrix precludes eddy current damping at high frequencies. In the gyromagnetic frequency regime the domain wall motion is expected to be severely damped, allowing only coherent rotation. For systems with coherent rotation being the only mode of reversal, the permeability is governed by the Snoek Limit.
520 $a This dissertation examines the effect of the Fe grain size and volume fraction on the gyromagnetic properties of Fe-R-O soft magnetic films. The nanocomposite and therefore magnetically inhomogeneous nature of the system presents a challenge in terms of the determination of the local magnetic properties. Various experimental techniques are used for DC and high frequency characterization. The local <italic>MS</italic> values, obtained from FMR measurements, show a distinct dependency on the surface to volume ratio. The large deviation from Snoek behavior is attributed to domain wall effect.
590 $a School code: 0060.
650 4 $a Physics, Electricity and Magnetism. $3 1019535
690 $a 0607
710 2 0 $a University of Delaware. $3 1017826
773 0 $t Dissertation Abstracts International $g 64-01B.
790 1 0 $a Xiao, John Q., $e advisor
790 $a 0060
791 $a Ph.D.
792 $a 2003
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoeng/servlet/advanced?query=3077871