Magnetic inhomogeneity on a triangular lattice: the magnetic-exchange versus the elastic energy and the role of disorder

Scientific Reports
A ZorkoA Lappas

Abstract

Inhomogeneity in the ground state is an intriguing, emergent phenomenon in magnetism. Recently, it has been observed in the magnetostructural channel of the geometrically frustrated α-NaMnO2, for the first time in the absence of active charge degrees of freedom. Here we report an in-depth numerical and local-probe experimental study of the isostructural sister compound CuMnO2 that emphasizes and provides an explanation for the crucial differences between the two systems. The experimentally verified, much more homogeneous, ground state of the stoichiometric CuMnO2 is attributed to the reduced magnetoelastic competition between the counteracting magnetic-exchange and elastic-energy contributions. The comparison of the two systems additionally highlights the role of disorder and allows the understanding of the puzzling phenomenon of phase separation in uniform antiferromagnets.

References

Aug 15, 1989·Physical Review. B, Condensed Matter·M Methfessel, A T Paxton
Apr 15, 1990·Physical Review. B, Condensed Matter·D Vanderbilt
Oct 5, 1992·Physical Review Letters·J Maclennan, M Seul
Sep 23, 1996·Physical Review Letters·H J Schulz
Oct 28, 1996·Physical Review Letters·J P PerdewM Ernzerhof
Nov 25, 2000·Science·C HarrisonP M Chaikin
Mar 4, 2003·Nature Materials·Gianpietro Malescio, Giuseppe Pellicane
Jul 9, 2005·Science·Elbio Dagotto
Aug 11, 2005·Physical Review Letters·C YasudaH Takayama
Feb 1, 2008·Physical Review Letters·Maud GiotAlexandros Lappas
Oct 2, 2009·Physical Review Letters·C StockP G Radaelli
Sep 30, 2009·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Paolo GiannozziRenata M Wentzcovitch
Mar 10, 2012·Physical Review Letters·J de GrootM Angst
Sep 26, 2012·Physical Review Letters·Y Kamiya, C D Batista

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saturation recovery

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