| An experimental investigation of the influence of binary host atomic order-disorder transitions on the spin-glass behavior of dilute alloys has been conducted. The investigation was carried out with the use of homebuilt vibrating sample magnetometer (VSM), a commercial squid based susceptometer, and an AC mutual inductance bridge apparatus. These instruments were used to study the magnetic susceptibility of three host alloy systems with the emphasis on (Cu(,3)Pt)(,1-x)Mn(,x).;An overview of general spin-glass theory and a discussion of experimental considerations including the design, calibration, and operation of the VSM are presented. The nature and reliability of the samples is discussed prior to the presentation of experimental results. The observed experimental behavior is presented and discussed in light of mean field theories, free electron RKKY couplings, mean free paths, Brillouin zones, and Fermi momentum effects. None of the above can explain the results in even a qualitative fashion. Finally, preliminary investigations were started on Cu(,3)AuMn alloys and the hysteresis behavior of Cu(,3)PtMn alloys. |
