Saturation magnetization variation

Hydrothermal Method. Iron [Fe(III)], barium, and the dopants are precipitated as their hydroxides and reacted with an excess of sodium hydroxide solution (up to 6 mol/L) at 250-350 °C in an autoclave. This is generally followed by an annealing treatment at 750-800°C to obtain products with the desired magnetic properties. Many variations of the process have been described [5.36]-[5.40], the earliest report being from 1969 [5.41], In later processes, hydrothermal synthesis is followed by coating with cubic ferrites, a process resembling the cobalt modification of iron oxides (see Section 5.1.2). The object is to increase the saturation magnetization of the material [5.42]-[5.44],... 

Fig. 9.7 The variation of the ratio of saturation magnetization at 7 K to that at 0 K with the ratio of the temperature to the Curie temperature.

Fig. 9.15 Variation of saturation magnetization with temperature for various garnets.

Figure 2. Variation of the saturation magnetization of 1 mg iron metal with tern-perature as recorded by a Faraday balance. Note that the apparent weight (saturation magnetization) of iron is much greater than its actual weight.

Fig. 11 Variation of the saturation magnetization M, as a function of for the samples of Figure 10.

M = Al. Figure 17 shows the variation of Curie temperature and saturation magnetization with composition (Sankar and Wallace 1976). Compositions beyond x = 0.2 tend not to saturate. 

Fig. 19. Saturation magnetization versus impurity content x for Fe75 xTJfSi25 alloys at 6.5 K. The solid lines indicate the expected variation of zero moment into [A,C] or [B] sites. Symbols indicate impurities.

NiMnSb and a disordered type bound in CoMnSb. Figure 40 shows the intrinsic magnetization as a function of temperature and the variation of saturation magnetization with x for this series and for Nij Co MnSb. For the latter, referring again to fig. 1, the Co atoms occupy not only the A(000) site but also partially the... 

Fig. 2. Qualitative variation of the nuclear magnetic resonance frequency with the strength of an applied external field for a spherical ferromagnetic sample with negligible magnetic anisotropy and isotropic, positive hyperfine field at low temperature (saturated magnetization).

Fig. 4.25. Plot showing the variation of saturation magnetization with the inverse of mean diameter for MnFe2 04 nanoparticles at 20 K (reproduced with permission from [795])...

Zr—Fe/TbFe)n amorphous multilayers. Katayama et al. (1987) have studied the variation of saturation magnetization as a function of the composition modulation period. As the multilayers becomes thinner, increases. This is explained by the fact that magnetization of Fe within the ZrFe film is induced by the TbFe film. 

Fig. 14.143. Variations of the saturation magnetization and coercive force vs. iron content for YFe,Coj4- ,Cu,6 systems (Narita, 1976).

---