Chiral Fluctuations in MnSi above the Curie Temperature

M ay 2 00 2 Chiral fluctuations in MnSi above the Curie temperature measured with polarized inelastic neutron scattering ∗

Using polarized inelastic neutron scattering the antisymmetric part of the dynamical susceptibility in non-centrosymmetric MnSi is determined. The paramagnetic fluctuations are found to be incommensurate with the chemical lattice and to have a chiral character. We show that antisymmetric interactions must be taken into account to properly describe the critical dynamics in MnSi above the Curie t...

Piezoelectricity above the Curie temperature? Combining flexoelectricity and functional grading to enable high-temperature electromechanical coupling

functional grading to enable high-temperature electromechanical coupling R. Mbarki, N. Baccam, Kaushik Dayal, and P. Sharma Department of Mechanical Engineering, University of Houston, Houston, Texas 77204, USA Department of Mathematics, Southwestern University, Georgetown, Texas 78626, USA Department of Civil and Environmental Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 1...

Magnetic polaron conduction above the Curie temperature in Fe-doped Pr0.75Sr0.25MnO3

The transport behaviour of Fe-doped Pr0.75Sr0.25MnO3 (PSMFO, Fe = 0.05) is studied by zero-field conductivity probing and Raman spectroscopy. It is revealed that the conductivity of PSMFO above Tm, the metal–insulator transition point, shows variable-range-hopping behaviour instead of the smallpolaron mode. The B2g Raman line at 630 cm−1 arising from the Mn–O bending and stretching modes underg...

Field dependence of non-reciprocal magnons in chiral MnSi

T. Weber,1, 2, ∗ J. Waizner,3 G. Tucker,4 R. Georgii,2 M. Kugler,1, 2 A. Bauer,1 C. Pfleiderer,1 M. Garst,5 and P. Böni1 Physik-Department, Technische Universität München (TUM), James-Franck-Str. 1, 85748 Garching, Germany Heinz-Maier-Leibnitz-Zentrum (MLZ), Technische Universität München (TUM), Lichtenbergstr. 1, 85747 Garching, Germany Institut für Theoretische Physik, Universität zu Köln, Zü...

Curie temperature of multiphase nanostructures