Room Temperature Ferromagnetism of Cu-Nanoparticles under Pirolysis of Copper Porphyrin

ORAL

Abstract

Systematic measurements were performed using XRD, STEM, SEM and PPMS for structural and magnetic properties of different size copper nanoparticles embedded in carbon matrix synthesized by solid phase pyrolysis in different modifications of polycrystalline copper porphyrin. Our results on magnetization carried out by vibrational magnetometer in wide range of temperature for average sizes of copper nanoparticles provide strong evidence on coexistence of ferromagnetism and strong paramagnetic behavior. At low temperatures we observe a strong paramagnetic behavior, apparently due to the conduction of electrons with ballistic mean free path (large orbital magnetism). The ferromagnetic behavior with hysteresis was observed from helium up to the room temperature.

*This work is supported by grants from the American National Science Foundation, Catsus grant No. HRD-1547723

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Presenters

  • Vicente Peña Pérez

    • California State University

Authors

  • Armen N Kocharian

    • California State University, Los Angeles

  • Vicente Peña Pérez

    • California State University

  • Anand Prakash

    • California State University

  • Steve Figueroa

    • California State University, Los Angeles

  • Eric Gutierrez

    • California State University, Los Angeles

  • Franco Iglesias

    • California State University, Los Angeles

  • Armond Khodagulyan

    • California State University, Los Angeles

  • Oscar O Bernal

    • California State University, Los Angeles