Magnetic properties and interaction effect in sputtered Nd{sub 2}Fe{sub 14}B films

Journal Article · Mon Sep 01 04:00:00 EDT 1997 · IEEE Transactions on Magnetics

DOI:https://doi.org/10.1109/20.619525· OSTI ID:566382

Tsai, J L; Huang, E Y; Chin, T S ^[1]; Chen, S K ^[2]

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1. Tsing Hua Univ., Hsinchu (Taiwan, Province of China). Dept. of Materials Science and Engineering
2. Feng Chia Univ., Taichung (Taiwan, Province of China). Dept. of Materials Science

Nd{sub 2}Fe{sub 14}B/Ta bilayers with individual layer thickness between 40--400 nm have been grown on Si(111) and polycrystalline alumina substrates, respectively, by dc magnetron sputtering. The coercivity of Nd{sub 2}Fe{sub 14}B film increases with increasing Ta thickness. Room temperature coercivity of 7--10 kOe was routinely obtained with Ta underlayer thicknesses greater than 40 nm. Exchange coupling among Nd{sub 2}Fe{sub 14}B nanocrystalline grains in the hard magnetic layer with high coercivity was studied by the Henkel plot, which shows positive and large deviation from the linear Wohlfarth relationship, depicting strong coupling among Nd{sub 2}Fe{sub 14}B nano-grains.

• Sponsoring Organization: National Science Council, Taipei (Taiwan, Province of China)
• OSTI ID: 566382
• Report Number(s): CONF-970468--
• Journal Information: IEEE Transactions on Magnetics, Journal Name: IEEE Transactions on Magnetics Journal Issue: 5Pt2 Vol. 33; ISSN IEMGAQ; ISSN 0018-9464
• Country of Publication: United States
• Language: English

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