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Unusual temperature dependence of the magnetic anisotropy constant in barium ferrite BaFe12O19
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10.1063/1.3657851
/content/aip/journal/jap/110/9/10.1063/1.3657851
http://aip.metastore.ingenta.com/content/aip/journal/jap/110/9/10.1063/1.3657851
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) XRD spectrum for the BaFe12O19 sample.

Image of FIG. 2.
FIG. 2.

(Color) Magnetic hysteresis loops for the silica-coated sample in a wide temperature range (4-700 K).

Image of FIG. 3.
FIG. 3.

(Color online) The isothermal M(H) curves in the third quadrant for H between 15 and 50 kOe. The curves from the bottom to the top are for 50, 100, 4.0, 200, 300, 400, 500, 600, and 700 K, respectively.

Image of FIG. 4.
FIG. 4.

(Color online) (a) Temperature dependence of the saturation magnetization Ms . The solid line is the best fitted curve by an expression: Ms (T) = Ms (0)[1 − (T/TC ) p ] with a fixed parameter: TC  = 740 K and two fitting parameters: Ms (0) = 92.3 ± 2.1 emu/g and p = 1.56 ± 0.11. The thick line is the high-field (50 kOe) magnetization M(T). (b) Temperature dependence of HK .

Image of FIG. 5.
FIG. 5.

(Color online) (a) Temperature dependence of the anisotropy constant K. The solid line is the best fitted curve by an expression: K(T) = K(0)[1 − (T/TC ) p ] with a fixed parameter: TC  = 740 K and two fitting parameters: K(0) = 4.48 × 106 erg/cm3 and p = 1.58 ± 0.04. (b) The relation between K and Ms .

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/content/aip/journal/jap/110/9/10.1063/1.3657851
2011-11-14
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Unusual temperature dependence of the magnetic anisotropy constant in barium ferrite BaFe12O19
http://aip.metastore.ingenta.com/content/aip/journal/jap/110/9/10.1063/1.3657851
10.1063/1.3657851
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