Low-field microwave magnetoimpedance in amorphous microwires

S. E. Lofland, S. M. Bhagat, M. Domínguez, J. M. García-Beneytez, F. Guerrero, M. Vázquez

Research output: Contribution to journalConference article

46 Scopus citations

Abstract

We have measured the low-field (<40 Oe) microwave losses in 5 μm diam glass-covered amorphous wires fabricated by the Taylor-Ulitovsky method at 9.8 and 32.5 GHz and their hysteresis loops at very low frequency (0.1 Hz). They exhibit well-differentiated hysteresis loops depending on the magnetostrictive character of the alloy compositions [positive (FeSiBC), vanishing (CoMnSiB), and negative (CoSiB) magnetostriction] as a consequence of the particular magnetoelastic anisotropy distribution and hence the spontaneous domain structure. In the low-field region for which the microwires are not magnetically saturated, as is typical in ferromagnetic resonance experiments, the microwave losses evolve with applied field in a similar manner to that of the magnetization process, and denote a correlation between microwave losses and the magnetization process of magnetically nonsaturated samples.

Original languageEnglish (US)
Pages (from-to)4442-4444
Number of pages3
JournalJournal of Applied Physics
Volume85
Issue number8 II A
DOIs
StatePublished - Apr 15 1999
EventProceedings of the 43rd Annual Conference on Magnetism and Magnetic Materials - Miami, FL, United States
Duration: Nov 9 1998Nov 12 1998

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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