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1999•Physical review. B, Condensed matterRequires access

Tetragonal equilibrium states of iron

P. M. Marcus, V. L. Moruzzi, S. L. Qiu

Open publisher page 43 citations

Abstract

First-principles total-energy calculations on tetragonal Fe show that the ferromagnetic and antiferromagnetic phases have tetragonal equilibrium states with $c/a>1,$ the fcc value. The bulk layers of an epitaxial film of Fe on Cu(001), which are almost fcc with the Cu lattice constant, are shown to be stable in the antiferromagnetic phase, but inherently unstable in the ferromagnetic phase. The structure of tetragonal equilibrium antiferromagnetic Fe is estimated to be $a=3.47\AA{},$ $c=3.75\AA{}.$

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What this paper is about

First-principles total-energy calculations on tetragonal Fe show that the ferromagnetic and antiferromagnetic phases have tetragonal equilibrium states with $c/a>1,$ the fcc value. The bulk layers of an epitaxial film of Fe on Cu(001), which are almost fcc with the Cu lattice constant, are shown to be stable in the antiferromagnetic phase, but inherently unstable in the ferromagnetic phase. The structure of tetragonal equilibrium antiferromagnetic Fe is estimated to be $a=3.47\AA{},$ $c=3.75\AA{}.$

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Available abstract

First-principles total-energy calculations on tetragonal Fe show that the ferromagnetic and antiferromagnetic phases have tetragonal equilibrium states with $c/a>1,$ the fcc value. The bulk layers of an epitaxial film of Fe on Cu(001), which are almost fcc with the Cu lattice constant, are shown to be stable in the antiferromagnetic phase, but inherently unstable in the ferromagnetic phase. The structure of tetragonal equilibrium antiferromagnetic Fe is estimated to be $a=3.47\AA{},$ $c=3.75\AA{}.$

Key concepts: Tetragonal crystal system, Antiferromagnetism, Condensed matter physics, Ferromagnetism, Materials science, Lattice constant, Lattice (music), Phase (matter)

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