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Magnetic Amorphous Alloys

After having discussed the non-magnetic alloys, we finally go to the more complex systems with Fe, Co and Ni or Pd instead of the noble metals. Extensive research on these metallic glasses has been done for many years by Piecuch et al. and Geny et. al. [5.118]. Ni-P and Pd-Si and many other alloys have successfully been prepared by different methods. For the samples reported here, a co-deposition with two magnetron sources as well as the sequential flash-evaporation technique has been used with no major differences in the physical properties [5.22]. [Pg.198]


T. Egami, Magnetic amorphous alloys. Report. Prog. Phys., 47 1601 (1984). [Pg.173]

After presenting the sample preparation in Sect. 5.2, we give an introduction to the theoretical background in Sect. 5.3. In Sect. 5.4, we briefly review the electronic influence on structure and phase stability of crystalline Hume-Rothery phases. In Sect. 5.5, we discuss the properties of non-magnetic amorphous alloys of the type just mentioned. The electronic influence on structure (5.5.1) and consequences for the phase stability (5.5.2) are also discussed. Structural influences on the electronic density of states are shown in 5.5.3. Electronic transport properties versus composition indicate additionally the electron-structure interrelation (5.5.4), and those versus temperature, the influence of low-lying collective density excitations (5.5.5). An extension of the model of the electronic influence on structure and stability was proposed by Hdussler and Kay [5.21,22] whenever local moments are involved as, for example, in Fe-containing alloys. In Sect. 5.6, experimental indications for such an influence are presented, and additional consequences on phase stability and magnetic properties are briefly discussed. [Pg.164]

An isotropic and non-magnetic. amorphous alloy has only two independent second order elastic constants. The other elastic moduli are related through the equations [30] ... [Pg.295]

The soft magnetic amorphous alloys are based on the ferromagnetic elements Fe, Co, andNi with additions of metalloid elements, the so-called glass forming elements Si, B, C, and P. The most stable alloys contain about 80 at.% transition metal (TM) and 20 at.% metalloid (M) components. [Pg.773]

Table 4.3-23 gives a survey of the magnetic and physical properties of several soft magnetic amorphous alloys... [Pg.776]

G. Le Caer, J.M. Dubois, H. Fisher, U. Gonser, H.G. Wagner, On the validity of Fe hyperfine field distribution calculations from Mossbauer spectra of magnetic amorphous alloys. Nucl. Instrum. Meth. Phys. Res. B 5, 25-33 (1984)... [Pg.181]

RELATION BETWEEN MAGNETIC PROPERTIES AND THE STRUCTURE OF IRON-BASED AMORPHOUS ALLOYS DETERMINED BY ELECTRON DIFFRACTION... [Pg.503]

The method of complex study of magnetic effects and the changes of electron diffraction patterns during the heating of amorphous alloys is developed. The study was carried out on the alloys Fe-Si-B, that were the bands in amorphous state. The phase composition that correspond to registrated diffraction patterns and to magnetic effects is established. [Pg.503]

The equations that describe the magnetic effects and the changes of electron diffraction patterns are got in consequence with the data of X-ray investigation of amorphous alloys and the products of crystallization. [Pg.503]

We used the common principles of quantitative analysis of additive properties of alloys developed in work [3].The following equation that describes the magnetic effect during the crystallization of the amorphous alloy Fes2Si2Bi6 was got ... [Pg.505]

In the same way the equation for the determination of the specific magnetization of boride FesB was obtained. This phase is formed during the crystallization amorphous alloy Fes2Si2Bi6. As we found the specific magnetization of boride FesB is 192 TllO" cmVm. This value is in 1,5 times greater then the specific magnetization of cementite G-FesC and 1,1 times lower then the specific magnetization of a-iron. [Pg.505]

According to experimental data, which we obtained the specific magnetization of alloy Fes2Si2Bi6 after it s crystallization measured at room temperature, does not differ of the magnetization of this alloy in amorphous... [Pg.505]

The calculation of measured in our experiments changes of magnetization in the temperature interval of phase transformation permit to determine the specific magnetization of the amorphous alloy Fes2Si2Bi6 at 470°C (743 K, this is the middle temperature of narrow interval of crystallization). [Pg.506]

Nanoscale thin films and multilayers, nanocrystalline magnetic materials, granular films, and amorphous alloys have attracted much attention in the last few decades, in the field of basic research as well as in the broader field of materials science. Such... [Pg.422]


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