skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Very low loss ultrathin Co-based amorphous ribbon cores

Abstract

Ultrathin Co-based amorphous ribbons with a thickness of 6--10 ..mu..m were fabricated by a single roller quenching method in vacuum. The compositions of the alloys were zero magnetostrictive: Fe/sub 4.7/Co/sub 70.3/Si/sub 15/B/sub 10/ and (Fe/sub 0.05/Co/sub 0.95/)/sub 71/(Si/sub 0.5/B/sub 0.5/)/sub 29/. The ribbons obtained had good smoothness and dimensional uniformity. The core loss of toroidal samples 15 mm in diameter was measured after annealing. The loss decreased with decreasing ribbon thickness. In the case of 6.4-..mu..m-thick (Fe,Co)/sub 71/(Si,B)/sub 29/ amorphous ribbon, the values at 100 kHz and 1 MHz were 40 mW/cm/sup 3/ and 1.8 W/cm/sup 3/ for B/sub m/ = 0.1 T, respectively. The former was 1/4 that of Mn-Zn ferrites or 1/2 that of 5-..mu..m-thick Supermalloy tape wound core loss. The latter was (2)/(3) that of 5-..mu..m Supermalloy tape wound core loss. In addition, the initial permeability beyond 100 kHz was also markedly improved by thickness reduction. The values of 6.4-..mu..m-thick (Fe,Co)/sub 71/(Si,B)/sub 29/ ribbon measured at 1 and 10 MHz were about 7000 and 1000 for H/sub m/ = 2 mOe, respectively.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Miyagi National College of Technology, Natori, Miyagi, Japan
OSTI Identifier:
6743789
Alternate Identifier(s):
OSTI ID: 6743789
Resource Type:
Journal Article
Resource Relation:
Journal Name: J. Appl. Phys.; (United States); Journal Volume: 64:10
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING; COBALT BASE ALLOYS; MAGNETIC PROPERTIES; IRON ALLOYS; MAGNETIC CORES; SILICON BORIDES; AMORPHOUS STATE; ENERGY LOSSES; THICKNESS; THIN FILMS; ALLOYS; BORIDES; BORON COMPOUNDS; COBALT ALLOYS; DIMENSIONS; FILMS; LOSSES; MAGNETIC STORAGE DEVICES; MEMORY DEVICES; PHYSICAL PROPERTIES; SILICON COMPOUNDS 360204* -- Ceramics, Cermets, & Refractories-- Physical Properties; 420800 -- Engineering-- Electronic Circuits & Devices-- (-1989)

Citation Formats

Yagi, M., Sato, T., Sakaki, Y., Sawa, T., and Inomata, K. Very low loss ultrathin Co-based amorphous ribbon cores. United States: N. p., 1988. Web. doi:10.1063/1.342151.
Yagi, M., Sato, T., Sakaki, Y., Sawa, T., & Inomata, K. Very low loss ultrathin Co-based amorphous ribbon cores. United States. doi:10.1063/1.342151.
Yagi, M., Sato, T., Sakaki, Y., Sawa, T., and Inomata, K. Tue . "Very low loss ultrathin Co-based amorphous ribbon cores". United States. doi:10.1063/1.342151.
@article{osti_6743789,
title = {Very low loss ultrathin Co-based amorphous ribbon cores},
author = {Yagi, M. and Sato, T. and Sakaki, Y. and Sawa, T. and Inomata, K.},
abstractNote = {Ultrathin Co-based amorphous ribbons with a thickness of 6--10 ..mu..m were fabricated by a single roller quenching method in vacuum. The compositions of the alloys were zero magnetostrictive: Fe/sub 4.7/Co/sub 70.3/Si/sub 15/B/sub 10/ and (Fe/sub 0.05/Co/sub 0.95/)/sub 71/(Si/sub 0.5/B/sub 0.5/)/sub 29/. The ribbons obtained had good smoothness and dimensional uniformity. The core loss of toroidal samples 15 mm in diameter was measured after annealing. The loss decreased with decreasing ribbon thickness. In the case of 6.4-..mu..m-thick (Fe,Co)/sub 71/(Si,B)/sub 29/ amorphous ribbon, the values at 100 kHz and 1 MHz were 40 mW/cm/sup 3/ and 1.8 W/cm/sup 3/ for B/sub m/ = 0.1 T, respectively. The former was 1/4 that of Mn-Zn ferrites or 1/2 that of 5-..mu..m-thick Supermalloy tape wound core loss. The latter was (2)/(3) that of 5-..mu..m Supermalloy tape wound core loss. In addition, the initial permeability beyond 100 kHz was also markedly improved by thickness reduction. The values of 6.4-..mu..m-thick (Fe,Co)/sub 71/(Si,B)/sub 29/ ribbon measured at 1 and 10 MHz were about 7000 and 1000 for H/sub m/ = 2 mOe, respectively.},
doi = {10.1063/1.342151},
journal = {J. Appl. Phys.; (United States)},
number = ,
volume = 64:10,
place = {United States},
year = {Tue Nov 15 00:00:00 EST 1988},
month = {Tue Nov 15 00:00:00 EST 1988}
}