52.7 kOe high coercivity in Sm(Co0.9Cu0.1)4.8 melt-spun ribbons | Zendy

Suresh Koppoju | Zendy; V. Chandrasekaran | Zendy; R. Gopalan | Zendy

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52.7 kOe high coercivity in Sm(Co0.9Cu0.1)4.8 melt-spun ribbons

Author(s) -

Suresh Koppoju,

V. Chandrasekaran,

R. Gopalan

Publication year - 2015

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4926600

Subject(s) - coercivity , materials science , recoil , microstructure , demagnetizing field , magnetization , melt spinning , grain size , nanoscopic scale , condensed matter physics , crystallography , metallurgy , magnetic field , composite material , nanotechnology , chemistry , physics , quantum mechanics , fiber

Fine grained Cu substituted melt-spun Sm(Co0.9Cu0.1)4.8 ribbons prepared with a wheel speed of 50 m/s exhibit a high coercivity of 52.7 kOe. Detailed magnetic studies like I and II quadrant magnetization-demagnetization characteristics, minor-loop measurement with increasing field and recoil behaviour have been carried out in combination with TEM studies. Fine spots of size ∼3 nm having different crystallographic orientations within the grains have been observed, and the high coercivity of the sample is attributed to complex domain wall interactions with the fine grain (∼55 nm) microstructure containing nanoscale heterogeneities

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