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Title: First-principles relativistic theory of the magnetic response of paramagnetic metals: Application to yttrium and scandium
Authors: V. Thakor
B. Staunton
J. Poulter
S. Ostanin
B. Ginatempo
Ezio Bruno
The University of Warwick
Mahidol University
Universita degli Studi di Messina
Keywords: Materials Science;Physics and Astronomy
Issue Date: 1-Jan-2003
Citation: Physical Review B - Condensed Matter and Materials Physics. Vol.68, No.13 (2003)
Abstract: We describe a first-principles theoretical formalism for the magnetic response of paramagnetic metals in which all relativistic effects such as spin-orbit coupling are included. In particular, the easy axis and dependence upon wave vector q of the paramagnetic spin susceptibility χ(q) can be calculated. To illustrate we apply the method to two transition metals, yttrium and scandium. In each case we find χ(q) to peak at a wave vector q=(0,0,0.57)π/c, coincident with a Fermi surface nesting vector, and to have an easy axis perpendicular to q. Since χ(q) plays a key role in determining the interaction between magnetic impurities in these metals, these results are consistent with the helical antiferromagnetic order found in many dilute rare-earth Y alloys. Conversely, the easy axis for the response to a uniform magnetic field, q=0, lies along the c axis. © 2003 The American Physical Society.
ISSN: 1550235X
Appears in Collections:Scopus 2001-2005

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