Ferromagnetic properties of cyclically deformed Fe3Ge and Ni3Ge

• Published in: Philosophical magazine (Abingdon, England) Vol. 84; no. 36; pp. 3883 - 3895
• Main Authors: Izumi †, T., Taniguchi ‡, M., Kumai §, S., Sato, A.
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis Group 21.12.2004; Taylor and Francis
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Domain effects, magnetization curves, and hysteresis; Exact sciences and technology; Fe and its alloys; Magnetic properties and materials; Magnetization curves, hysteresis, Barkhausen and related effects; Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects; Other ferromagnetic metals and alloys; Physics; Studies of specific magnetic materials; Temperature dependence; Inorganic compounds; Curie point; Magnetization; Intermetallic compounds; Anti-phase boundaries; Transition element compounds; Iron germanides; Ferromagnetic materials; Binary compounds; Experimental study; Stress-strain relations; Density; Dislocations; Coercive force; Cyclic deformation; Nickel germanides
• ISSN: 1478-6435; 1478-6443
• DOI: 10.1080/14786430410001725908

The magnetisation behaviour of cyclically deformed and non-deformed Fe 3 Ge and Ni 3 Ge is examined at sufficiently low temperatures below the Curie point. Despite these two intermetallics having the same L1 2 structure, they are found to show quite different behaviour in their ferromagnetic properties; the spontaneous magnetisation (M S ) remains unaffected in the former whereas it decreases notably in the latter after cyclic deformation. The origin of the difference is investigated and attributed to the difference in operative shear planes. These are mainly on {001} planes without the introduction of notable amounts of anti-phase boundary (APB) tubes in Fe 3 Ge and mainly on {111} planes with the introduction of a high density of APB tubes composed of {111} APBs in Ni 3 Ge. The effects of cyclic deformation on the high-field susceptibility χ and the coercive force (H C ) are also discussed by taking into account the dislocation distributions introduced by the {001} and {111} slips.