Amorphous Magnetism II by P. W. Anderson (auth.), R. A. Levy, R. Hasegawa (eds.)

By P. W. Anderson (auth.), R. A. Levy, R. Hasegawa (eds.)

The papers making up this quantity signify a precis of the lawsuits of the second one foreign Symposium on Amorphous Magnetism held at Rensselaer Polytechnic Institute on August 25- 27, 1976. a result of resounding good fortune of the Inter­ nationwide Symposium on Amorphous Magnetism held at Wayne country collage on August 17 and 18, 1972 this symposium used to be back geared up with the aim in brain of supplying a discussion board for dis­ cussion of the newest theoretical and experimental advances made within the fields of spin glass platforms, amorphous magnetic alloys and magnetic oxide glasses. The symposium used to be subsidized by way of the yankee actual Society and supported by way of a supply from GTE Laboratories. extra aid cash have been supplied by means of normal electrical, Allied Chemical and Ford Motor corporation. this system committee consisted of J. J. Becker (General Electric), P. A. Casabella (RPI), P. J. Cote (Watervliet Arsenal), A. M. de Graaf (Wayne nation University), R. Hasegawa, Co-Chairman (Allied Chemical), H. O. Hooper (University of Maine), H. B. Huntington (RPI), R. A. Levy, Chairman (RPI), R. okay. MacCrone (RPI), L. N. Mulay (Penn country University), G. L. Salinger (RPI) and J. Wong (General Electric). this system of the symposium incorporated 7 invited assessment papers, fifty three contributed papers, and 10 extra papers learn by way of identify as a result of time barriers. The editors desire to expand their deep appreciation to J. J. Becker, A. M. de Graaf, P. Duwez, J. Gustafson, D. L. Huber, U.

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OIS at. 28 at. % Fe. In addition, contrary to the sharp change in AH Table 1. 9 (S) at. 03 (3) o. 18 -0. 2 at. 28 at. % Fe. 8(2) for ",t, .... 1 ... 015 AT. 0 .... 4Fe) Fig. 2. 015 at. 28 at. 015 at. 28 at. % Fe, both of which are estimated from the susceptibil ity data. 3 J: c ~ CDeI) ....... 1< d5

Therefore, most of the ~+ stay in the region outside the giant moment. 3 at. 28 at. % Fe, so that the contact fields on the ~+ originate from the polarized d-holes inside the giant moment which is formed by the exchange enhancement effect in the d-band. 14 Superimposed on this and dominant at the region outside the giant moments, we expect a conduction electron polarization from the RKKY exchange interaction with the local ized Fe moment without enhancement effect. 14 The conduction electron polarization changes rapidly with position.

M Jm Jm c • (14) With J .. given by Eq. (13), we obtain the limiting behavi6t- for k « k , p being the number of spins per unit volume. IR the opposite lbmit, k » a constant value given by k , w(k) approaches 0 (16) although in this regime the modes are likely to be overdamped. III. DISCUSSION The frequency and damping of the spin waves are both functions of temperature. The latter is difficult to calculate. However, it is plausible that the modes are overdamped before the spin ~lass transition is reached.

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