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Theroy of magnetic inertial dynamics in two-sublattice ferromagnets.
J Phys Condens Matter
May 2021
Department of Spintronics and Nanoelectronics, Institute of Physics ASCR, v.v.i., Cukrovarnická 10, Prague 6, 162 53, Czech Republic.
The magnetic inertial dynamics have previously been investigated for one sublattice ferromagnets. Here, we develop the magnetization dynamics in two-sublattice ferromagnets including the intra- and inter-sublattice inertial dynamics. First, we derive the magnetic susceptibility of such a ferromagnet.
View Article and Find Full Text PDFSub-picosecond exchange-relaxation in the compensated ferrimagnet MnRuGa.
J Phys Condens Matter
January 2021
Radboud University, Institute for Molecules and Materials, 6525 AJ Nijmegen, The Netherlands.
We study the demagnetization dynamics of the fully compensated half-metallic ferrimagnet MnRuGa. While the two antiferromagnetically coupled sublattices are both composed of manganese, they exhibit different temperature dependencies due to their differing local environments. The sublattice magnetization dynamics triggered by femtosecond laser pulses are studied to reveal the roles played by the spin and intersublattice exchange.
View Article and Find Full Text PDFThresholding of the Elliott-Yafet spin-flip scattering in multi-sublattice magnets by the respective exchange energies.
Sci Rep
January 2021
Institute for Methods and Instrumentation for Synchrotron Radiation Research FG-ISRR, Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, 12489, Berlin, Germany.
How different microscopic mechanisms of ultrafast spin dynamics coexist and interplay is not only relevant for the development of spintronics but also for the thorough description of physical systems out-of-equilibrium. In pure crystalline ferromagnets, one of the main microscopic mechanism of spin relaxation is the electron-phonon (el-ph) driven spin-flip, or Elliott-Yafet, scattering. Unexpectedly, recent experiments with ferro- and ferrimagnetic alloys have shown different dynamics for the different sublattices.
View Article and Find Full Text PDFEvolution of magnetic properties and exchange interactions in Ru doped YbCrO3.
J Phys Condens Matter
October 2016
Department of Materials Science, Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700032, India.
Magnetic properties of YbCr1-x Ru x O3 as a function of temperature and magnetic field have been investigated to explore the intriguing magnetic phenomena in rare-earth orthochromites. A quantitative analysis of x-ray photoelectron spectroscopy confirms the mixed valence state (Yb(3+) and Yb(2+)) of Yb ions for the highest doped sample. Field-cooled magnetization reveals a broad peak around 75 K and then becomes zero at about 20-24 K, due to the antiparallel coupling between Cr(3+) and Yb(3+) moments.
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