Amorphous Magnetism: Proceedings of the International by P. W. Anderson (auth.), Henry O. Hooper, Adriann M. de Graaf

By P. W. Anderson (auth.), Henry O. Hooper, Adriann M. de Graaf (eds.)

The name of amorphous magnetism used to be conceived to en­ compass the examine of the magnetic homes of dilute ran­ dom substitutional alloys, amorphous steel alloys, amor­ phous magnetic semiconductors and the traditional glasses, together with cha1cogenide, natural and inorganic glasses. those fabrics have heretofore been thought of to be really various a result of alterations of their atomic struc­ tures. even though, whilst the magnetic habit of those mater­ ials is punctiliously tested it turns into transparent that those fabrics show yes similarities. For the 1st time on the overseas Symposium on Amorphous Magnetism held at Wayne country college in Detroit, Michigan on August 17 and 18, 1972, scientists operating in those components have been assembled to envision the similarities of those structures. This quantity incorporates a precis of the nine invited talks, 23 brought, contributed papers and an extra 12 contri­ buted papers whcih weren't awarded as a result of insuffic­ ient time within the application. This quantity offers for the 1st time a suite of the most up-tp-date theoretical and experimental experiences within the quarter of amorphous magnetism. we want to thank the authors of those papers for his or her amazing cooperation in getting ready their manuscripts and for modifying our transcriptions from tape recordings of the discussions which their displays. additionally, we want to thank the contributors at this convention whose enthusiasm and curiosity made the convention so successful.

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Extra info for Amorphous Magnetism: Proceedings of the International Symposium on Amorphous Magnetism, August 17–18, 1972, Detroit, Michigan

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Here the spectra are arranged frem tep to. bettom in decreasing ameunts of Fe203, and it can be seen that the intensity ef the magnetic hyperfine interaction increases as the iren concentration increases. The major hyperfine lines can be identified as due to. the presence ef crystalline iren exides y-Fe203' a-Fe203 and Fe304' Hewever, there is an additienal 12 line spectrum which appears to. arise from a garnet type structure in which a beren replaces the yttrium. ~t----+-_~--::--<-:-+~- . - + - - - - 1 - - - t - - - ~--~ VELOCITY Figure 5.

In Fig. 3 the temperature dependence of X and l/X is shown for the glass sample containing 35 wt% Fe203 and having a room temperature susceptibility of 496 x 10-6 emu/gm. This sample appears to be glassy and presumably the shape of l/X is due to magnetic clustering. 4 ~B. The magnetic moment for the 35 wt% Fe203 glass for which data are shown in Fig. 3 has a higher effective moment, the exact value of which depends on the temperature region used to evaluate the magnetic moment. Rather interesting data were obtained for several samples (for example, the last three samples in Table I) whose room temperature susceptibility was very large.

Mech. Phys. SolidS-15, 319 (1967). L. Thomsen, J. Geophys. Res. 77, 315 (1972). Z. Rashin, App1. Mech. Rev. 17, 1 (1964). L. Fo1dy, Phys. Rev. 67, 107 (1945). M. Lax, Rev. Mod. Phys. 23, 287 (1951); Phys. Rev. ~, 621 (1952). R. Kraichnan, Proc. Symp. App1. Math. (American Math. ) 13, 199 (1962). Wedgwood Atomic Energy Research Establishment, Harwell ABSTRACT Phosphorus pentoxide glasses containing high concentrations of Mn 2 +, Fe 3 +, Ni 2 +, Co2 + and Cu 2 + have been prepared and measurements made of their magnetic susceptibility and low temperature speCific heat.

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