Magnetism of Nanocrystallized Amorphous Fe75B10Si15
Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Amorphous ribbons of alloy composition Fe75B10Si15 are cast by melt spinning and annealed to partially nanocrystalline states. The magnetic properties are investigated by VSM and MTGA. Structure is examined using XRD and SEM. Results obtained show nanostructured material with excellent soft magnetism in samples annealed at temperatures below the crystallization temperature as well as enhancement of magnetic hardness for annealing at high temperatures. This validates Herzer’s Random Anisotropy model of magnetism in nanostructured materials and provides basis for further inquiry into tweaking alloy compositions and/or manipulating annealing parameters. Also, increase of Curie temperature is noted with respect to increasing annealing temperatures arising from stress relaxation, validating a study on the relationship between the two.
Place, publisher, year, edition, pages
2012. , 62 p.
amorphous metals, nanocrystalline materials, magnetism, soft magnetic material
Other Materials Engineering
IdentifiersURN: urn:nbn:se:kth:diva-107191OAI: oai:DiVA.org:kth-107191DiVA: diva2:575242
Subject / course
Engineering Material Physics
Master of Science - Materials Science and Engineering
2012-12-03, M131 - Conf. Room (Sefstrom), Brinellvägen 23, Stockholm, 16:00 (English)
Rao, K Venkat, Prof.Belova, Liubov, Dr.
Rao, K Venkat, Prof.