Download Handbook of Magnetic Materials, Volume 7 by K.H.J. Buschow PDF

By K.H.J. Buschow

Quantity 7 of the instruction manual of Magnetic fabrics offers an summary of a few of the main intriguing themes in magnetism today.Firstly, a considerable breakthrough within the figuring out of metal magnetism has been reached by way of digital band constitution calculation. growth during this sector has been made not just end result of the availability of excessive velocity computing machines but in addition because of sophistication within the computational technique. chapters are dedicated to this topic, considered one of that is dedicated to the weather and the opposite dealing basically with 4f and 5f structures, together with examples of the big crew of intermetallic compounds. In either chapters the authors have focused on explaining the physics in the back of those band calculations. The chapters are written in a way comprehensible to scientists having no event with band calculations.Thin movie expertise has turn into a key factor in excessive density magnetic and magneto-optical recording and may be handled in destiny volumes of the guide. the current quantity introduces the sphere with a bankruptcy at the magnetism of ultrathin transition steel motion pictures, describing the richness in novel magnetic phenomens that has been encountered long ago few years in those fabrics. Of equivalent curiosity are the radical magnetic phenomena saw whilst magnetic moments are included in a semiconducting matrix. A entire description of those fabrics is located within the bankruptcy on diluted magnetic semiconductors. A separate bankruptcy is dedicated to the growth made within the box of heavy fermions and valence fluctuations, emphasis being put on the real effects bought through neutron scattering. a close evaluate of the development made within the box of infrequent earth dependent intermetallic compounds together with 3d transition metals completes this multifaceted quantity.

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Magnetic thin film phenomena 5. Magnetic anisotropies in ultrathin films One of the most remarkable properties of ultrathin magnetic films is given by their unusual magnetic anisotropies. They are not only important for applications, but their presence is decisive too for the existence of long-range magnetic order in these two-dimensional systems. We therefore start our discussion of magnetic film phenomena with magnetic anisotropies. 1. Anisotropy contributions In the following, we consider magnetic anisotropies in homogeneously magnetized samples, or homogeneously magnetized regions of a film.

The unique combination of crystalline and surface anisotropies in Co(0001) was first realized by Carcia et al. (1985) in texturized Pd/Co multilayers prepared by sputtering techniques. For an extended discussion including a comparison with Co/Pt multilayers we refer to the paper of Carcia (1988). As shown in fig. 5 nm. oi_ , -,o ..... 011 OO,T ~'~ M~= 159 ~ , . ~ . . . . 01z -; M {emu) oo, ...... L (d) ),=92~, Fig. 21. Magnetization loops of Pd/Co multilayers, taken at 300 K, with the field in the film plane (dashed curves) or along the surface normal (full lines).

6) for the sum of both volume-type crystalline contributions, with a common anisotropy constant Kv. 8) which actually consists of a real constant volume term and a surface term proportional to lid. 9c) H(i) = 2K(si)/(SJ,). 10) where D is the number of atomic layers in the film, D = d/6. We use eqs. 10) as starting points for our analysis. It should be emphasized that H L (called 4uMs,ef f in part of the CGS-written literature, such as Heinrich et al. 1988a) is just the quantity which comes out of an anisotropy analysis of a film by TOM, F M R or BLS.

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