Bending effects and temperature dependence of magnetic properties in a Fe-rich amorphous wire |
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| Institution: | 1. Phyzen Genomics Institute, Seongnam 13558, South Korea;2. Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea;3. Graduate School of Fisheries and Environmental Sciences, Nagasaki University, Nagasaki 852-8521, Japan;4. Organization for Marine Science and Technology, Nagasaki University, Nagasaki 852-8521, Japan;5. Marine Ecological Risk Assessment Center, West Sea Fisheries Research Institute, National Institute of Fisheries Science, Incheon 46083, South Korea;1. Computer Vision & Pattern Recognition Unit, Indian Statistical Institute, Kolkata 700108, India;2. Department of Computer Science, San Jose Sate University, San Jose, CA 95192, USA;3. Electronics & Communication Sciences Unit, Indian Statistical Institute, Kolkata 700108, India;4. Department of Physical Sciences, Indian Institute of Science Education and Research, Mohanpur Campus, Kolkata 741246, India |
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| Abstract: | Amorphous wires with composition Fe77.5Si7.5B15 exhibit a very peculiar magnetization process characterized by a single and quite large Barkhausen jump. This gives rise to a squared hysteresis loop at a critical magnetic field. The bistable behaviour, widely studied in wires with typical length of 10 cm and diameter of 125 μm, appears above a length of about 7 cm in straight wires and disappears for curvature radius within the range 2–12 cm in bent wires. In this work it is shown that bistability occurs in bent wires, whatever their curvature is, provided the wires are long enough. To this purpose spiral-shaped samples with several turns are considered. However, when the wire length is not a integer number of turns the magnetization reverses through many large Barkhausen jumps. In this condition, varying the measuring temperature can activate the energy barriers for the jumps. |
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