Download Heusler Alloys: Properties, Growth, Applications by Claudia Felser, Atsufumi Hirohata PDF

By Claudia Felser, Atsufumi Hirohata

This ebook offers an summary of the physics of Heusler compounds starting from basic homes of those alloys to their functions. particularly Heusler compounds as half-metallic ferromagnetic and topological insulators are vital in condensed subject technological know-how because of their power in magnetism and as fabrics for strength conversion. The e-book is written by way of world-leaders during this box. It bargains an awesome connection with researchers at any level.

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Vacancies are also a very common defect occurring during the growth of samples of Heusler compounds. In the case of Co2 CrZ or Co2 MnZ compounds when the vacancy occurs at sites occupied by Co atoms the half-metallicity is destroyed contrary to vacancies at the Cr(Mn) or Z sites which leave the half-metallic character of the parent compounds unaltered [136]. In [138] it was shown for several families of Heusler compounds that the occurrence of vacancies at the A or C sites (see Fig. 1) occupied by the higher-valent transition-metal atoms alters the local environment of the atoms destroying the half-metallic character of the compounds under study.

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For all calculations we assumed that the lattice constant varies linearly with the concentration x which has been verified for several quaternary alloys [10, 11]. 4 Al has been studied experimentally [201–205]. 1. The first possible case is when we have two different low-valent transition metal atoms at the Y site like Co2 [Cr1−x Mnx ]Al. The total spin moment varies linearly between the 3 μB of Co2 CrAl and the 4 μB of Co2 MnAl. 6 the total spin moment shows the SP behavior but for larger concentrations it slightly deviates to account for the non-integer moment value of Co2 FeAl.

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