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Magnetic Properties in Microwave of Nanocrystalline FeB Alloy Grain(PDF)

《南京师大学报（自然科学版）》[ISSN:1001-4616/CN:32-1239/N]

Issue:
2007年01期
Page:
39-43
Research Field:
物理学
Publishing date:

Info

Title:
Magnetic Properties in Microwave of Nanocrystalline FeB Alloy Grain
Author(s):
Lu Xiaoming1; Zhao Tao2; Jiang Zhengsheng1
1.Department of Physics,Nanjing University,Nanjing 210093,China
2. Departm ent ofM aterials Scien ce and E ngineering, Nan jing Un ivers ity, N an jing 210093, C hina
Keywords:
nanocry sta lline FeB a lloy grain;  m agnetic properties in m icrow ave frequency reg im e;  m agne-t ic diss ipa tion;  inte rme tallic com pound
PACS:
O482.54
DOI:
-
Abstract:
The sy stema tic and de ta iled study has been carr ied out on them agnetic properties o f nano crysta lline FeB a lloys. The sam ples are prepared by mechan ic a lloy ing m ethod and gra in size are analyzed by X- ray d iffraction m easurem ents. It is found that a lloy particles a re com posed of nano- sized granules of approx ima tely 10 nm. The m agneticm easurements in the static and m icrowave frequency reg im e on a ser ies o f FeB alloy samp les indicate tha t: ( 1) the specific satura tion m agne tization RS o f FeB a lloy g ra in decreases w ith B content. ( 2) m agnetic d issipation reaches am ax imum va lue a t B concentration around 5at. %, and the effec tive m agne tic pe rmeability and intrinsic m agne tic perm eab ility take the va lue L = 3. 06 - j3144 and μi = 5.67- j12. 11, respectively, plus furthe r increase in B content beyond 10at. % b rings abou t rapid decrease in m agnetic d issipation. ( 3) the frequency correspond ing to the peak va lue ofm agne-t ic dissipa tion genera lly decreases w ith B concentration. Based on above observations, we conclude that: ( 1) com ponent optim iza tion in nanoc rystalline FeB a lloy s is o f v ita l im po rtance in enhanc ing them agnetic d issipation. ( 2) the o ccurrence o f inte rm etallic FeB phase must be avo ided s ince it is un favorable to the m agnetic dissipa tion.

References:

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Last Update: 2013-05-05