DocumentCode :
1332616
Title :
Magnetostrictions of Sm 
Fe 
and Sm  of Sm<sub>2</sub>Fe<sub>17</sub> is about -155 × 10<sup>-6</sup> at 300 K. It becomes positive after nitrogenation [Sm<sub>2</sub>Fe<sub>17</sub>N<sub>3</sub>, λ<sub>t</sub> is about + 44 × 10<sup>-6</sup> at 300 K (H = 8 T)] due to the crystal field effect and the exchange striction. It was noticed that inverse magnetostriction effect can be used to increase the magnetic alignment and remanence of the bonded magnets. As a result, transverse die-pressing (H ⊥P) was very effective in increasing the degree of magnetic alignment of Sm<sub>2</sub>Fe<sub>17</sub>N<sub>3</sub> powders, yielding remanence higher than that obtained by axial die-pressing (H//P). By increasing the degree of magnetic alignment of powders, the maximum energy product (BH)<sub>max</sub> of Sm<sub>2</sub>Fe<sub>17</sub>N<sub>3</sub> bonded magnet was improved by 15%.</div>
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<div class='leftDiv labelDiv col-xs-4 col-sm-2 fullRecLabelEnglish'>Keywords : </div><div class='valueDiv leftDirection leftAlign col-xs-8 col-sm-10 fullRecValueEnglish'>magnetostriction; permanent magnets; remanence; samarium compounds; Sm<sub>2</sub>Fe<sub>17</sub>N<sub>3</sub>; axial die-pressing; bonded magnets; crystal field effect; exchange striction; inverse magnetostriction effect; magnetic alignment; magnetic field; magnetic flux density 8 T; nitrogenation; powders; remanence; rotating-sample methods; strain gauge; temperature 300 K; transverse die-pressing; Iron; Magnetostriction; Perpendicular magnetic anisotropy; Saturation magnetization; Temperature measurement; Magnetic alignment; Sm<formula formulatype=)
$_{2}$ Fe$_{17}$ $_{3}$
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2011.2154312
Filename :
6028246
Link To Document :
