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Lantz G, Neugebauer MJ, Kubli M, et al. Coupling between a Charge Density Wave and Magnetism in an Heusler Material. Phys Rev Lett. 2017;119(22):227207doi: 10.1103/PhysRevLett.119.227207.
Lantz, G., Neugebauer, M. J., Kubli, M., Savoini, M., Abreu, E., Tasca, K., Dornes, C., Esposito, V., Rittmann, J., Windsor, Y. W., Beaud, P., Ingold, G., & Johnson, S. L. (2017). Coupling between a Charge Density Wave and Magnetism in an Heusler Material. Physical review letters, 119(22), 227207. https://doi.org/10.1103/PhysRevLett.119.227207
Lantz, G, et al. "Coupling between a Charge Density Wave and Magnetism in an Heusler Material." Physical review letters vol. 119,22 (2017): 227207. doi: https://doi.org/10.1103/PhysRevLett.119.227207
Lantz G, Neugebauer MJ, Kubli M, Savoini M, Abreu E, Tasca K, Dornes C, Esposito V, Rittmann J, Windsor YW, Beaud P, Ingold G, Johnson SL. Coupling between a Charge Density Wave and Magnetism in an Heusler Material. Phys Rev Lett. 2017 Dec 01;119(22):227207. doi: 10.1103/PhysRevLett.119.227207. Epub 2017 Nov 29. PMID: 29286787.
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Phys Rev Lett. 2017 Dec 01;119(22):227207. doi: 10.1103/PhysRevLett.119.227207. Epub 2017 Nov 29.

Coupling between a Charge Density Wave and Magnetism in an Heusler Material.

Physical review letters

G Lantz, M J Neugebauer, M Kubli, M Savoini, E Abreu, K Tasca, C Dornes, V Esposito, J Rittmann, Y W Windsor, P Beaud, G Ingold, S L Johnson

Affiliations

  1. Institute for Quantum Electronics, Physics Department, ETH Zurich, CH-8093 Zurich, Switzerland.
  2. Swiss Light Source, Paul Scherrer Institut, CH-5232 Villigen PSI, Switzerland.

PMID: 29286787 DOI: 10.1103/PhysRevLett.119.227207

Abstract

The prototypical magnetic memory shape alloy Ni_{2}MnGa undergoes various phase transitions as a function of the temperature, pressure, and doping. In the low-temperature phases below 260 K, an incommensurate structural modulation occurs along the [110] direction which is thought to arise from the softening of a phonon mode. It is not at present clear how this phenomenon is related, if at all, to the magnetic memory effect. Here we report time-resolved measurements which track both the structural and magnetic components of the phase transition from the modulated cubic phase as it is brought into the high-symmetry phase. The results suggest that the photoinduced demagnetization modifies the Fermi surface in regions that couple strongly to the periodicity of the structural modulation through the nesting vector. The amplitude of the periodic lattice distortion, however, appears to be less affected by the demagnetization.

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