Amorphous FeCoCrSiB Ribbons with Tailored Anisotropy for the Development of Magnetic Elements for High Frequency Applications

• Published in: Materials Vol. 15; no. 12; p. 4160
• Main Authors: Kurlyandskaya, Galina V., Lezama, Luis, Pasynkova, Anna A., Volchkov, Stanislav O., Lukshina, Vera A., Larrañaga, Aitor, Dmitrieva, Natalia V., Timofeeva, Anastasia V., Orue, Iñaki
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 12-06-2022; MDPI
• Subjects: Alloys; amorphous ribbons; Anisotropy; Annealing; Crystallization; Data analysis; Ferromagnetic resonance; Ferromagnetism; Frequency ranges; Heat; Hysteresis loops; Kerr magnetooptical effect; Magnetic anisotropy; Magnetic domains; magnetic field sensors; Magnetic fields; Magnetic measurement; magnetization process; Magnetoimpedance; Measurement techniques; Optical microscopy; Permeability; Perturbation methods; Radiation; Rapid quenching (metallurgy); Reflectance; Ribbons; Sample holders; Superhigh frequencies
• ISSN: 1996-1944; 1996-1944
• DOI: 10.3390/ma15124160

The ferromagnetic resonance (FMR) in the frequency range of 0.5 to 12.5 GHz has been investigated as a function of external magnetic field for rapidly quenched Fe3Co67Cr3Si15B12 amorphous ribbons with different features of the effective magnetic anisotropy. Three states of the ribbons were considered: as-quenched without any treatment; after relaxation annealing without stress at the temperature of 350 °C during 1 h; and after annealing under specific stress of 230 MPa at the temperature of 350 °C during 1 h. For FMR measurements, we adapted a technique previously proposed and tested for the case of microwires. Here, amorphous ribbons were studied using the sample holder based on a commercial SMA connector. On the basis of the measurements of the reflection coefficient S11, the total impedance including its real and imaginary components was determined to be in the frequency range of 0.5 to 12.5 GHz. In order to confirm the validity of the proposed technique, FMR was also measured by the certified cavity perturbation technique using a commercial Bruker spectrometer operating at X-band frequency of 9.39 GHz. As part of the characterization of the ribbons used for microwave measurements, comparative analysis was performed of X-ray diffraction, optical microscopy, transmission electron microscopy, inductive magnetic hysteresis loops, vibrating sample magnetometry, magneto-optical Kerr effect (including magnetic domains) and magnetoimpedance data for of all samples.