Helimagnetic structures in epitaxial Nd/Y superlattices and alloys

B.A. Everitt; M.B. Salamon; J.A. Borchers; R.W. Erwin; J.J. Rhyne; B.J. Park; K.V. O'Donovan; D.F. McMorrow; C.P. Flynn

doi:10.1103/PhysRevB.56.5452

Helimagnetic structures in epitaxial Nd/Y superlattices and alloys

B.A. Everitt, M.B. Salamon, J.A. Borchers, R.W. Erwin, J.J. Rhyne, B.J. Park, K.V. O'Donovan, D.F. McMorrow, C.P. Flynn

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Abstract

The complex magnetic structure of Nd exhibits a new magnetic phase when grown epitaxially, either as a stabilized double hexagonal close-packed alloy, or as part of a Nd/Y superlattice. In the alloy and in those superlattices with small Nd/Y ratios, the incommensurate b axis modulated structure exhibited by elemental Nd at T-N = 19.9 K is absent. In its place, incommensurate helimagnetic order, similar to that in dilute yttrium alloys of the heavy lanthanides, appears below approximately 30 K. Evidence for coherent propagation of the magnetic spiral through the Y spacers is observed in some Y-rich superlattices. As the Nd:Y ratio in the superlattices is increased, the b axis modulated phases reappear and coexist with the helical phase. Thick epitaxial Nd films, nevertheless, exhibit only bulklike magnetic structure. We discuss these observations in terms of band structure modifications.

Original language	English
Journal	Physical Review B
Volume	56
Issue number	9
Pages (from-to)	5452-5460
ISSN	2469-9950
DOIs	https://doi.org/10.1103/PhysRevB.56.5452
Publication status	Published - 1997

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title = "Helimagnetic structures in epitaxial Nd/Y superlattices and alloys",

abstract = "The complex magnetic structure of Nd exhibits a new magnetic phase when grown epitaxially, either as a stabilized double hexagonal close-packed alloy, or as part of a Nd/Y superlattice. In the alloy and in those superlattices with small Nd/Y ratios, the incommensurate b axis modulated structure exhibited by elemental Nd at T-N = 19.9 K is absent. In its place, incommensurate helimagnetic order, similar to that in dilute yttrium alloys of the heavy lanthanides, appears below approximately 30 K. Evidence for coherent propagation of the magnetic spiral through the Y spacers is observed in some Y-rich superlattices. As the Nd:Y ratio in the superlattices is increased, the b axis modulated phases reappear and coexist with the helical phase. Thick epitaxial Nd films, nevertheless, exhibit only bulklike magnetic structure. We discuss these observations in terms of band structure modifications.",

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author = "B.A. Everitt and M.B. Salamon and J.A. Borchers and R.W. Erwin and J.J. Rhyne and B.J. Park and K.V. O'Donovan and D.F. McMorrow and C.P. Flynn",

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T1 - Helimagnetic structures in epitaxial Nd/Y superlattices and alloys

AU - Everitt, B.A.

AU - Salamon, M.B.

AU - Borchers, J.A.

AU - Erwin, R.W.

AU - Rhyne, J.J.

AU - Park, B.J.

AU - O'Donovan, K.V.

AU - McMorrow, D.F.

AU - Flynn, C.P.

PY - 1997

Y1 - 1997

N2 - The complex magnetic structure of Nd exhibits a new magnetic phase when grown epitaxially, either as a stabilized double hexagonal close-packed alloy, or as part of a Nd/Y superlattice. In the alloy and in those superlattices with small Nd/Y ratios, the incommensurate b axis modulated structure exhibited by elemental Nd at T-N = 19.9 K is absent. In its place, incommensurate helimagnetic order, similar to that in dilute yttrium alloys of the heavy lanthanides, appears below approximately 30 K. Evidence for coherent propagation of the magnetic spiral through the Y spacers is observed in some Y-rich superlattices. As the Nd:Y ratio in the superlattices is increased, the b axis modulated phases reappear and coexist with the helical phase. Thick epitaxial Nd films, nevertheless, exhibit only bulklike magnetic structure. We discuss these observations in terms of band structure modifications.

AB - The complex magnetic structure of Nd exhibits a new magnetic phase when grown epitaxially, either as a stabilized double hexagonal close-packed alloy, or as part of a Nd/Y superlattice. In the alloy and in those superlattices with small Nd/Y ratios, the incommensurate b axis modulated structure exhibited by elemental Nd at T-N = 19.9 K is absent. In its place, incommensurate helimagnetic order, similar to that in dilute yttrium alloys of the heavy lanthanides, appears below approximately 30 K. Evidence for coherent propagation of the magnetic spiral through the Y spacers is observed in some Y-rich superlattices. As the Nd:Y ratio in the superlattices is increased, the b axis modulated phases reappear and coexist with the helical phase. Thick epitaxial Nd films, nevertheless, exhibit only bulklike magnetic structure. We discuss these observations in terms of band structure modifications.

KW - Nye funktionelle materialer

U2 - 10.1103/PhysRevB.56.5452

DO - 10.1103/PhysRevB.56.5452

M3 - Journal article

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VL - 56

SP - 5452

EP - 5460

JO - Physical Review B

JF - Physical Review B

IS - 9

ER -

Helimagnetic structures in epitaxial Nd/Y superlattices and alloys

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