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Coercivity enhancement in Mn-Al-Cu flakes produced by surfactant-assisted milling

Publication Type : Journal Article

Publisher : AIP Publishing

Source : Applied Physics Letters 2015, 107 (19), 192407.

Campus : Amritapuri

School : School for Sustainable Futures

Year : 2016

Abstract : We herein report the achievement of exceptionally high coercivity (Hc) values: 9.92 and 5.86 kOe at 5 and 300 K, respectively, for Mn55Al43Cu2 flakes produced by surfactant-assisted milling process without employing any heat-treatment. The use of surfactants such as oleic acid and oleylamine during milling yielded high-aspect ratio flakes for the Mn-Al-Cu alloy. Structural studies confirmed the presence of τ- and β-phases as the major constituents in the Mn-Al-Cu flakes. The observed Hc enhancement is due to the increase in anisotropy field and structural defects, which is hypothesized to originate from the domain-wall pinning as a consequence of precipitation of fine Cu-particles present at the grain boundaries.

Cite this Research Publication : Saravanan, P.; Hsu, J.-H.; Vinod, V. T. P.; Černík, M.; Kamat, S. V. "Coercivity Enhancement in Mn-Al-Cu Flakes Produced by Surfactant-Assisted Milling". Applied Physics Letters 2015, 107 (19), 192407.

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