Magnetization and Resistivity Study of FCC $\gamma $-Fe Precipitates in Cu

POSTER

Abstract

Magnetization and resistivity measurements on two samples of Cu + 2.0 at.{\%} Fe are reported here. The first sample, prepared by annealing at 950 $^{o}$C for 2 days followed by rapid quenching, consists of a random solid solution of Fe in Cu. The magnetization follows the Curie-Weiss law 10 K $<$= T $<$= 300 K yielding an effective Fe moment of 1.9 $\mu _{B }$+/- 0.1 $\mu _{B}$ and Curie temperature of -- 2.0 K +/- 2.0 K. The second sample, prepared using the heat treatment above followed by a second annealing at 620 $^{o}$C for 2 hours, consists of face-centered-cubic $\gamma $-Fe precipitates in the Cu matrix. Evidence is given for an antiferromagnetic ordering occurring in this sample with a Neel temperature $\approx $ 55 K. The magnetization follows the Curie-Weiss law 100 K $<$= T $<$= 300 K yielding an effective Fe moment of 1.8 $\mu _{B}$ +/- 0.2 $\mu _{B}$ and a Curie temperature of -- 58 K +/--10 K. Resistivity measurements are also presented which assist in describing the structural nature and relevant magnetic interactions for these two samples.

Authors

  • Joseph Budnick

    University of Connecticut, Department of Physics, University of Connecticut, Storrs, CT 06269-3046

  • William Hines

    Department of Physics, University of Connecticut, Storrs, CT 06269-3046

  • V.E. Guiseppe

    University of Connecticut, Univ. of New Hampshire, Sandia National Labs, IBM Research Center, PTB, TUNL, Petersburg Nuc. Phys. Inst., Yale Univ., U.S. Coast Guard Acad., Department of Physics, University of Connecticut, Storrs, CT 06269-3046, Physics Department, Carnegie Mellon University, Pittsburgh, PA 15213, Division of Proton Engineering Frontier Project, Korea Atomic Energy Research Institute, Daejeon, Korea, Department of Chemistry, Sogang University, Seoul, Korea, Materials Science Department, Brookhaven National Lab, Upton, NY 11973, Canadian Light Source, University of Saskatchewan, Saskatoon, Canada, Department of Physics, University of Connecticut, Storrs, CT 06269, RMD Inc., Watertown, MA, ALEM Associates, Boston, MA, Physics Department, University of Connecticut, Storrs, CT, University of South Dakota, LANL

  • V.E. Guiseppe

    University of Connecticut, Univ. of New Hampshire, Sandia National Labs, IBM Research Center, PTB, TUNL, Petersburg Nuc. Phys. Inst., Yale Univ., U.S. Coast Guard Acad., Department of Physics, University of Connecticut, Storrs, CT 06269-3046, Physics Department, Carnegie Mellon University, Pittsburgh, PA 15213, Division of Proton Engineering Frontier Project, Korea Atomic Energy Research Institute, Daejeon, Korea, Department of Chemistry, Sogang University, Seoul, Korea, Materials Science Department, Brookhaven National Lab, Upton, NY 11973, Canadian Light Source, University of Saskatchewan, Saskatoon, Canada, Department of Physics, University of Connecticut, Storrs, CT 06269, RMD Inc., Watertown, MA, ALEM Associates, Boston, MA, Physics Department, University of Connecticut, Storrs, CT, University of South Dakota, LANL

  • David Perry

    University of Connecticut, Department of Physics, University of Connecticut, Storrs, CT 06269-3046

  • V.E. Guiseppe

    University of Connecticut, Univ. of New Hampshire, Sandia National Labs, IBM Research Center, PTB, TUNL, Petersburg Nuc. Phys. Inst., Yale Univ., U.S. Coast Guard Acad., Department of Physics, University of Connecticut, Storrs, CT 06269-3046, Physics Department, Carnegie Mellon University, Pittsburgh, PA 15213, Division of Proton Engineering Frontier Project, Korea Atomic Energy Research Institute, Daejeon, Korea, Department of Chemistry, Sogang University, Seoul, Korea, Materials Science Department, Brookhaven National Lab, Upton, NY 11973, Canadian Light Source, University of Saskatchewan, Saskatoon, Canada, Department of Physics, University of Connecticut, Storrs, CT 06269, RMD Inc., Watertown, MA, ALEM Associates, Boston, MA, Physics Department, University of Connecticut, Storrs, CT, University of South Dakota, LANL