Download e-book for kindle: Spintronics: From Materials to Devices by Tanja Graf, Claudia Felser (auth.), Claudia Felser, Gerhard
By Tanja Graf, Claudia Felser (auth.), Claudia Felser, Gerhard H Fecher (eds.)
Spintronics is an rising know-how exploiting the spin measure of freedom and has proved to be very promising for brand spanking new sorts of quickly digital units. among the expected benefits of spintronics applied sciences, researchers have pointed out the non-volatile garage of information with excessive density and occasional power intake as relatively correct.
This monograph examines the idea that of half-metallic compounds views to acquire novel strategies and discusses numerous oxides akin to perovskites, double perovskites and CrO2 in addition to Heusler compounds. Such fabrics could be designed and made with excessive spin polarization and, specifically in relation to Heusler compounds, many material-related difficulties found in current-day 3d steel structures, should be triumph over.
Spintronics: From fabrics to Devices offers an perception into the present learn on Heusler compounds and gives a basic realizing of structure–property relationships, together with the impact of ailment and correlations at the digital constitution and interfaces. Spintronics units reminiscent of magnetic tunnel junctions (MTJs) and gigantic magnetoresistance (GMR) units, with present perpendicular to the aircraft, during which Co2 established Heusler compounds are used as new electrode fabrics, also are introduced.
From fabrics layout via theoretical equipment and the coaching and homes of the fabrics to the creation of skinny motion pictures and units, this monograph represents a priceless consultant to either newcomers and specialists within the fields of Chemistry, Physics, and fabrics Science.
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Extra resources for Spintronics: From Materials to Devices
18 μB at 5 K. In addition, the hysteresis indicates a soft magnetic behavior. The value of the measured magnetic moment is not an integer, as would be expected for a half-metallic ferromagnet with four atoms in the primitive cell. Thus, unlike most of the other Co2 Y Z Heusler compounds, Co2 CrIn cannot be a half-metallic ferromagnet. Finally, it should be noted that it was not possible up to now to stabilize other Co2 CrZ compounds in a pure L21 structure. 2 Tuning the Fermi Energy in the Middle of the Gap: From Co2 FeSi to Co2 Mn1−x Fex Si and Co2 FeAl1−x Six Due to insuperable problems such as disorder and the low magnetic moment of compounds containing Cr (and Al), we moved on to investigate new materials that clearly exhibit both the ordered L21 structure and a high Curie temperature.
Typical powder diffraction patterns are shown in Fig. 11(right). 96 Å. Additionally, the structural parameter of Ru2 TiSi has been investigated in dependence of the temperature between 20 K and 300 K. 11(left) shows the temperature dependency of the cell volume V = a 3 of the cubic cell. 5 % if the temperature is lowered from room temperature to 20 K. The change of the cell volume with temperature is clearly non-linear and evidence is given that the volume increases with an approximate T 3 law.
Wang et al. [41, 42] assumed that partial chemical disorder was responsible for this discrepancy with the theoretical predictions. Investigations [25, 30, 33, 46] of the electronic structure of Heusler compounds indicate that on-site correlation plays an important role in these compounds and 22 B. Balke et al. Fig. 5 Si. The spectrum was taken at 290 K and excited by a 57 Co(Rh) source. Solid lines are results of a fit to determine the sextet and doublet contributions and to evaluate the hyperfine field may serve to destroy the half-metallic properties of Co2 MnSi.
Spintronics: From Materials to Devices by Tanja Graf, Claudia Felser (auth.), Claudia Felser, Gerhard H Fecher (eds.)