• Ipatov, Mihail
• Salaheldeen Mohamed Hassan, Mohamed
• Zhukova, V.
• Zhukov, A.
• Wederni, Asma

Abstract

<jats:p>We used the Taylor-Ulitovsky Technique to prepare nanocrystalline Co2MnGe Heusler alloy glass-coated microwires with a metallic nucleus diameter of 18 &amp;plusmn; 0.1 &amp;micro;m and a total diameter of 27.2 &amp;plusmn; 0.1 &amp;micro;m. Magnetic and structural studies were carried out to determine the fundamental magneto-structural characteristics of Co2MnGe glass-coated microwires. XRD revealed a well-defined nanocrystalline structure with average grain size about 63 nm, lattice parameter a = 5.62 and a unique mixture of L21 and B2 phases. The magnetization curves for field cooling and field heating (FC-FH) demonstrate a considerable dependence on the applied magnetic field, ranging from 50 Oe to 20 kOe. Internal stresses, originated by the production process, resulted in various magnetic phases, which were responsible for the notable difference of field cooling (FC) and field heating (FH) curves on magnetization dependence versus temperature. Furthermore, the ferromagnetic behavior and expected high Curie temperature together with high degree of L21 ordered makes it a promising candidate for many applications.</jats:p>

Topics

• grain
• grain size
• phase
• x-ray diffraction
• glass
• glass
• magnetization
• Curie temperature