Large energy product enhancement in perpendicularly coupled MnBi/CoFe magnetic bilayers

T. R. Gao; L. Fang; S. Fackler; S. Maruyama; X. H. Zhang; L. L. Wang; T. Rana; P. Manchanda; A. Kashyap; K. Janicka; A. L. Wysocki; A. T. N'Diaye; E. Arenholz; J. A. Borchers; B. J. Kirby; B. B. Maranville; K. W. Sun; M. J. Kramer; V. P. Antropov; D. D. Johnson; R. Skomski; J. Cui; I. Takeuchi

doi:10.1103/PhysRevB.94.060411

Large energy product enhancement in perpendicularly coupled MnBi/CoFe magnetic bilayers

T. R. Gao, L. Fang, S. Fackler, S. Maruyama, X. H. Zhang, L. L. Wang, T. Rana, P. Manchanda, A. Kashyap, K. Janicka, A. L. Wysocki, A. T. N'Diaye, E. Arenholz, J. A. Borchers, B. J. Kirby, B. B. Maranville, K. W. Sun, M. J. Kramer, V. P. Antropov, D. D. JohnsonR. Skomski, J. Cui, I. Takeuchi

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

We demonstrate substantial enhancement in the energy product of MnBi-based magnets by forming robust ferromagnetic exchange coupling between a MnBi layer and a thin CoFe layer in a unique perpendicular coupling configuration, which provides increased resistance to magnetization reversal. The measured nominal energy product of 172kJ/m3 at room temperature is the largest value experimentally attained for permanent magnets free of expensive raw materials. Our finding shows that exchange-coupled MnBi/CoFe magnets are a viable option for pursuing rare-earth-free magnets with energy products approaching those containing rare-earth elements.

Original language	English
Article number	060411
Journal	Physical Review B
Volume	94
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevB.94.060411
Publication status	Published - 2016 Aug 29
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Gao, T. R., Fang, L., Fackler, S., Maruyama, S., Zhang, X. H., Wang, L. L., Rana, T., Manchanda, P., Kashyap, A., Janicka, K., Wysocki, A. L., N'Diaye, A. T., Arenholz, E., Borchers, J. A., Kirby, B. J., Maranville, B. B., Sun, K. W., Kramer, M. J., Antropov, V. P., ... Takeuchi, I. (2016). Large energy product enhancement in perpendicularly coupled MnBi/CoFe magnetic bilayers. Physical Review B, 94(6), [060411]. https://doi.org/10.1103/PhysRevB.94.060411

Gao, TR, Fang, L, Fackler, S, Maruyama, S, Zhang, XH, Wang, LL, Rana, T, Manchanda, P, Kashyap, A, Janicka, K, Wysocki, AL, N'Diaye, AT, Arenholz, E, Borchers, JA, Kirby, BJ, Maranville, BB, Sun, KW, Kramer, MJ, Antropov, VP, Johnson, DD, Skomski, R, Cui, J & Takeuchi, I 2016, 'Large energy product enhancement in perpendicularly coupled MnBi/CoFe magnetic bilayers', Physical Review B, vol. 94, no. 6, 060411. https://doi.org/10.1103/PhysRevB.94.060411

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title = "Large energy product enhancement in perpendicularly coupled MnBi/CoFe magnetic bilayers",

abstract = "We demonstrate substantial enhancement in the energy product of MnBi-based magnets by forming robust ferromagnetic exchange coupling between a MnBi layer and a thin CoFe layer in a unique perpendicular coupling configuration, which provides increased resistance to magnetization reversal. The measured nominal energy product of 172kJ/m3 at room temperature is the largest value experimentally attained for permanent magnets free of expensive raw materials. Our finding shows that exchange-coupled MnBi/CoFe magnets are a viable option for pursuing rare-earth-free magnets with energy products approaching those containing rare-earth elements.",

author = "Gao, {T. R.} and L. Fang and S. Fackler and S. Maruyama and Zhang, {X. H.} and Wang, {L. L.} and T. Rana and P. Manchanda and A. Kashyap and K. Janicka and Wysocki, {A. L.} and N'Diaye, {A. T.} and E. Arenholz and Borchers, {J. A.} and Kirby, {B. J.} and Maranville, {B. B.} and Sun, {K. W.} and Kramer, {M. J.} and Antropov, {V. P.} and Johnson, {D. D.} and R. Skomski and J. Cui and I. Takeuchi",

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year = "2016",

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day = "29",

doi = "10.1103/PhysRevB.94.060411",

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AU - Gao, T. R.

AU - Fang, L.

AU - Fackler, S.

AU - Maruyama, S.

AU - Zhang, X. H.

AU - Wang, L. L.

AU - Rana, T.

AU - Manchanda, P.

AU - Kashyap, A.

AU - Janicka, K.

AU - Wysocki, A. L.

AU - N'Diaye, A. T.

AU - Arenholz, E.

AU - Borchers, J. A.

AU - Kirby, B. J.

AU - Maranville, B. B.

AU - Sun, K. W.

AU - Kramer, M. J.

AU - Antropov, V. P.

AU - Johnson, D. D.

AU - Skomski, R.

AU - Cui, J.

AU - Takeuchi, I.

PY - 2016/8/29

Y1 - 2016/8/29

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AB - We demonstrate substantial enhancement in the energy product of MnBi-based magnets by forming robust ferromagnetic exchange coupling between a MnBi layer and a thin CoFe layer in a unique perpendicular coupling configuration, which provides increased resistance to magnetization reversal. The measured nominal energy product of 172kJ/m3 at room temperature is the largest value experimentally attained for permanent magnets free of expensive raw materials. Our finding shows that exchange-coupled MnBi/CoFe magnets are a viable option for pursuing rare-earth-free magnets with energy products approaching those containing rare-earth elements.

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Large energy product enhancement in perpendicularly coupled MnBi/CoFe magnetic bilayers

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