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></div>
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<div class='row g-0 align-items-center mb-2'><div class='col-12 col-md-3 fullRecLabelEnglish fw-bold mb-2 mb-md-0'><span class='text-muted small'>Keywords</span></div><div class='col-12 col-md-9 leftDirection leftAlign'>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