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

被引：22

作者：

Gao, T. R. ^{[1
]}

Fang, L. ^{[1
]}

Fackler, S. ^{[1
]}

Maruyama, S. ^{[1
]}

Zhang, X. H. ^{[1
]}

Wang, L. L. ^{[2
]}

Rana, T. ^{[3
,4
,5
]}

Manchanda, P. ^{[3
,4
]}

Kashyap, A. ^{[5
,6
]}

Janicka, K. ^{[2
]}

Wysocki, A. L. ^{[2
]}

N'Diaye, A. T. ^{[7
]}

Arenholz, E. ^{[7
]}

Borchers, J. A. ^{[8
]}

Kirby, B. J. ^{[8
]}

Maranville, B. B. ^{[8
]}

Sun, K. W. ^{[2
]}

Kramer, M. J. ^{[2
]}

Antropov, V. P. ^{[2
]}

Johnson, D. D. ^{[2
,9
]}

Skomski, R. ^{[3
,4
]}

Cui, J. ^{[10
]}

Takeuchi, I. ^{[1
]}

机构：

[1] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA

[2] US DOE, Div Mat Sci & Engn, Ames Lab, Ames, IA 50011 USA

[3] Univ Nebraska, Dept Phys & Astron, Lincoln, NE 68588 USA

[4] Univ Nebraska, Nebraska Ctr Mat & Nanosci, Lincoln, NE 68588 USA

[5] LNM Inst Informat Technol, Dept Phys, Jaipur, Rajasthan, India

[6] Indian Inst Technol, Sch Basic Sci, Mandi, Himachal Prades, India

[7] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

[8] NIST, NIST Ctr Neutron Res, Gaithersburg, MD 20899 USA

[9] Iowa State Univ, Dept Mat Sci & Engn, Ames, IA 50011 USA

[10] Pacific Northwest Natl Lab, Energy & Environm Directorate, Richland, WA 99354 USA

来源：

PHYSICAL REVIEW B | 2016年 / 94卷 / 06期

关键词：

NANOCOMPOSITE PERMANENT-MAGNETS; INITIO MOLECULAR-DYNAMICS; EXCHANGE; SIMULATION; MEDIA;

D O I：

10.1103/PhysRevB.94.060411

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 172 kJ/m(3) 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.

引用

页数：5

共 34 条

[1] A NEW PERMANENT MAGNET FROM POWDERED MANGANESE BISMUTHIDE
ADAMS, E
HUBBARD, WM
SYELES, AM
[J]. JOURNAL OF APPLIED PHYSICS, 1952, 23 (11) : 1207 - 1211
[2] Aharoni A., 1996, Introduction to the Theory of Ferromagnetism
[3] Magnetic nanostructuring and overcoming Brown's paradox to realize extraordinary high-temperature energy products
Balasubramanian, Balamurugan
Mukherjee, Pinaki
Skomski, Ralph
Manchanda, Priyanka
Das, Bhaskar
Sellmyer, David J.
[J]. SCIENTIFIC REPORTS, 2014, 4
[4] Enhanced exchange bias effects in a nanopatterned system consisting of two perpendicularly coupled ferromagnets
Bollero, A.
Dieny, B.
Sort, J.
Buchanan, K. S.
Landis, S.
Nogues, J.
[J]. APPLIED PHYSICS LETTERS, 2008, 92 (02)
[5] Brown W. F., 1963, Micromagnetics
[6] Thermal stability of MnBi magnetic materials
Cui, J.
Choi, J. P.
Li, G.
Polikarpov, E.
Darsell, J.
Overman, N.
Olszta, M.
Schreiber, D.
Bowden, M.
Droubay, T.
Kramer, M. J.
Zarkevich, N. A.
Wang, L. L.
Johnson, D. D.
Marinescu, M.
Takeuchi, I.
Huang, Q. Z.
Wu, H.
Reeve, H.
Vuong, N. V.
Liu, J. P.
[J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2014, 26 (06)
[7] Spin configurations in hard/soft coupled bilayer systems: Transitions from rigid magnet to exchange-spring
de Sousa, N.
Apolinario, A.
Vernay, F.
Monteiro, P. M. S.
Albertini, F.
Casoli, F.
Kachkachi, H.
Schmool, D. S.
[J]. PHYSICAL REVIEW B, 2010, 82 (10):
[8] High performance hard magnetic NdFeB thick films for integration into micro-electro-mechanical systems
Dempsey, N. M.
Walther, A.
May, F.
Givord, D.
Khlopkov, K.
Gutfleisch, O.
[J]. APPLIED PHYSICS LETTERS, 2007, 90 (09)
[9] Fitzsimmons M. R., 2005, APPL POLARIZED NEUTR
[10] Exchange-spring behavior in epitaxial hard/soft magnetic bilayers
Fullerton, EE
Jiang, JS
Grimsditch, M
Sowers, CH
Bader, SD
[J]. PHYSICAL REVIEW B, 1998, 58 (18) : 12193 - 12200

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