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Engineering coercivity in YFe2 dominated DyFe2/YFe2 superlattice by patterning

Engineering coercivity in YFe2 dominated DyFe2/YFe2 superlattice by patterning
Engineering coercivity in YFe2 dominated DyFe2/YFe2 superlattice by patterning
Single crystal 400 nm thick Laves phase [20 Å DyFe2/80 Å YFe2]40 superlattice have been grown by MBE with a (110) growth direction. VSM measurements performed at room temperature with an applied field range of ±1.2×105 Oe, directed along the [001] direction, reveal a unique single-phase-liked ferrimagnetic behavior. A dominant exchange spring behavior is revealed by MOKE measurement along the [–110] direction. Furthermore, for striped arrays patterned along the [001] direction with height-to-width ratio of 0.05, a shape anisotropy of the order of 104 erg/cm3 is induced, resulting into a pronounced change of coercivity due to the comparable magnitude with intrinsic anisotropies. The results demonstrate the feasibility of engineering both single-phase-liked and exchange-spring magnet behavior in Laves phase epitaxial hard/soft superlattices by patterning.
0947-8396
325-328
Wang, K.
2b399d1b-c3f1-4863-b78b-dd9135ef7532
Martin, K.N.
c53d0004-4655-40e9-aa05-563f3a9602c4
Morrison, C.G.
898e574a-5683-47d3-a454-906a5bb82851
Ward, R.C.C.
b5eaa153-e136-4555-8b07-325a4b5329cb
Bowden, G.J.
f73a1c01-4d38-4170-bf30-9ebfa4283807
de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d
Wang, K.
2b399d1b-c3f1-4863-b78b-dd9135ef7532
Martin, K.N.
c53d0004-4655-40e9-aa05-563f3a9602c4
Morrison, C.G.
898e574a-5683-47d3-a454-906a5bb82851
Ward, R.C.C.
b5eaa153-e136-4555-8b07-325a4b5329cb
Bowden, G.J.
f73a1c01-4d38-4170-bf30-9ebfa4283807
de Groot, P.A.J.
98c21141-cf90-4e5c-8f2b-d2aae8efb84d

Wang, K., Martin, K.N., Morrison, C.G., Ward, R.C.C., Bowden, G.J. and de Groot, P.A.J. (2007) Engineering coercivity in YFe2 dominated DyFe2/YFe2 superlattice by patterning. Applied Physics A: Materials Science & Processing, 86 (3), 325-328. (doi:10.1007/s00339-006-3791-x).

Record type: Article

Abstract

Single crystal 400 nm thick Laves phase [20 Å DyFe2/80 Å YFe2]40 superlattice have been grown by MBE with a (110) growth direction. VSM measurements performed at room temperature with an applied field range of ±1.2×105 Oe, directed along the [001] direction, reveal a unique single-phase-liked ferrimagnetic behavior. A dominant exchange spring behavior is revealed by MOKE measurement along the [–110] direction. Furthermore, for striped arrays patterned along the [001] direction with height-to-width ratio of 0.05, a shape anisotropy of the order of 104 erg/cm3 is induced, resulting into a pronounced change of coercivity due to the comparable magnitude with intrinsic anisotropies. The results demonstrate the feasibility of engineering both single-phase-liked and exchange-spring magnet behavior in Laves phase epitaxial hard/soft superlattices by patterning.

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Published date: March 2007

Identifiers

Local EPrints ID: 143967
URI: http://eprints.soton.ac.uk/id/eprint/143967
ISSN: 0947-8396
PURE UUID: 2300c3fc-e34f-4946-8487-bc0c37e083ef

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Date deposited: 03 Jun 2010 13:40
Last modified: 17 Jul 2019 00:07

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