Temperature dependence of magnetic microstructure in Fe76Mo8Cu1B15 nanocrystalline alloy

• Published in: Physica status solidi. A, Applied research Applied research, 2004-12, Vol.201 (15), p.3280-3284
• Main Authors: Miglierini, M., Degmová, J., Kaňuch, T., Grenèche, J.-M.
• Format: Article
• Language: English
• Subjects: 75.50.Bb; 75.50.Tt; 75.75.+a; 76.80.+y; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Magnetic properties and materials; Magnetic resonances and relaxations in condensed matter, mössbauer effect; Mössbauer effect; other γ-ray spectroscopy; Physics
• ISSN: 0031-8965; 1521-396X
• DOI: 10.1002/pssa.200405438

Fe76Mo8Cu1B15 nanocrystalline alloy featuring close‐to‐room Curie temperature of 310 K proves to be suitable for model case studies of complexity of magnetic interactions. Annealed samples with different contents of nanocrystallites are characterized by 57Fe transmission Mössbauer spectrometry performed in a wide temperature range (77–673 K). The validity of the temperature dependences of hyperfine parameters is discussed for all structural components including amorphous residual phase, bcc Fe nanocrystals and interface regions located in between the former two. Cautions which must be considered in deriving information about their relative contents are pointed out, because of the presence of static and dynamic effects at high temperatures due to non‐interacting and weakly interacting single domain ferromagnetic grains dispersed into a paramagnetic amorphous matrix. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)