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The influence of short time heat treatment on the magnetic behaviour of SmCo5/α-Fe nanocomposite obtained by mechanical milling

R. HIRIAN1,2,* , S. MICAN1, O. ISNARD3,4, V. POP1

Affiliation

  1. Faculty of Physics, Babeş-Bolyai University, Cluj-Napoca, RO-400084, Romania
  2. MedFuture Research Center for Advance Medicine, “Iuliu Hațieganu” University of Medicine and Pharmacy, L. Pasteur 4-6, 400349 Cluj-Napoca, Romania
  3. University Grenoble Alpes, Institut NÉEL, 25 rue des martyrs, F-38042 Grenoble, France
  4. CNRS, Institut NÉEL, 25 rue des martyrs, F-38042 Grenoble, France

Abstract

Exchange coupled nanocomposite hold great promise for the future of permanent magnets, with a predicted energy density of 1 MJ/m3. However, due to the precise nanostructure control required, compaction at high temperature can pose difficulties. In this work we explore the effects of high temperature annealing, up to 820 °C (for a short duration), on the magnetic properties of exchange coupled SmCo5+20%Fe nanocomposite powders produced trough mechanical milling. These results were compared to those obtained for samples annealed at lower temperature for a longer duration (up to 1.5 h). In both cases promising energy products (estimated for the 100% dense samples) of approximately 100 kJ/m3 have been obtained, for certain annealing regimes in isotropic samples..

Keywords

magnetic nanocomposites, spring magnet, short time annealing, mechanical milling.

Submitted at: Dec. 6, 2021
Accepted at: Dec. 6, 2022

Citation

R. HIRIAN, S. MICAN, O. ISNARD, V. POP, The influence of short time heat treatment on the magnetic behaviour of SmCo5/α-Fe nanocomposite obtained by mechanical milling, Journal of Optoelectronics and Advanced Materials Vol. 24, Iss. 11-12, pp. 594-598 (2022)