Helical spin-density waves in Fe/Cr trilayers with perfect interfaces

R. S. Fishman

doi:10.1063/1.369900

Helical spin-density waves in Fe/Cr trilayers with perfect interfaces

R. S. Fishman

Materials Theory

Research output: Contribution to journal › Conference article › peer-review

2 Scopus citations

Abstract

Despite the presence of only collinear, commensurate (C) and incommensurate (I) spin-density waves (SDWs) in bulk Cr, the interfacial steps in Fe/Cr multilayers are now believed to stabilize a helical (H) SDW within the Cr spacer. Yet HSDWs were first predicted in an Fe/Cr trilayer with perfect interfaces when the orientation of the Fe moments does not favor C ordering: if the number of Cr monolayers is even (odd) and the Fe moments are pointing in the same (opposite) direction, then a CSDW does not gain any coupling energy. Under these circumstances, a simple model verifies that H ordering is indeed favored over I ordering provided that the Fermi surface mismatch is sufficiently small or the temperature sufficiently high.

Original language	English
Pages (from-to)	5877-5879
Number of pages	3
Journal	Journal of Applied Physics
Volume	85
Issue number	8 II B
DOIs	https://doi.org/10.1063/1.369900
State	Published - Apr 15 1999
Event	Proceedings of the 43rd Annual Conference on Magnetism and Magnetic Materials - Miami, FL, United States Duration: Nov 9 1998 → Nov 12 1998

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title = "Helical spin-density waves in Fe/Cr trilayers with perfect interfaces",

abstract = "Despite the presence of only collinear, commensurate (C) and incommensurate (I) spin-density waves (SDWs) in bulk Cr, the interfacial steps in Fe/Cr multilayers are now believed to stabilize a helical (H) SDW within the Cr spacer. Yet HSDWs were first predicted in an Fe/Cr trilayer with perfect interfaces when the orientation of the Fe moments does not favor C ordering: if the number of Cr monolayers is even (odd) and the Fe moments are pointing in the same (opposite) direction, then a CSDW does not gain any coupling energy. Under these circumstances, a simple model verifies that H ordering is indeed favored over I ordering provided that the Fermi surface mismatch is sufficiently small or the temperature sufficiently high.",

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AU - Fishman, R. S.

PY - 1999/4/15

Y1 - 1999/4/15

N2 - Despite the presence of only collinear, commensurate (C) and incommensurate (I) spin-density waves (SDWs) in bulk Cr, the interfacial steps in Fe/Cr multilayers are now believed to stabilize a helical (H) SDW within the Cr spacer. Yet HSDWs were first predicted in an Fe/Cr trilayer with perfect interfaces when the orientation of the Fe moments does not favor C ordering: if the number of Cr monolayers is even (odd) and the Fe moments are pointing in the same (opposite) direction, then a CSDW does not gain any coupling energy. Under these circumstances, a simple model verifies that H ordering is indeed favored over I ordering provided that the Fermi surface mismatch is sufficiently small or the temperature sufficiently high.

AB - Despite the presence of only collinear, commensurate (C) and incommensurate (I) spin-density waves (SDWs) in bulk Cr, the interfacial steps in Fe/Cr multilayers are now believed to stabilize a helical (H) SDW within the Cr spacer. Yet HSDWs were first predicted in an Fe/Cr trilayer with perfect interfaces when the orientation of the Fe moments does not favor C ordering: if the number of Cr monolayers is even (odd) and the Fe moments are pointing in the same (opposite) direction, then a CSDW does not gain any coupling energy. Under these circumstances, a simple model verifies that H ordering is indeed favored over I ordering provided that the Fermi surface mismatch is sufficiently small or the temperature sufficiently high.

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IS - 8 II B

T2 - Proceedings of the 43rd Annual Conference on Magnetism and Magnetic Materials

Y2 - 9 November 1998 through 12 November 1998

ER -

Helical spin-density waves in Fe/Cr trilayers with perfect interfaces

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