Modeling longitudinal spin fluctuations in chiral magnets.
作者： A M Belemuk , S M Stishov
关键词: Phase transition 、 Magnet 、 Condensed matter physics 、 Specific heat 、 Hamiltonian (quantum mechanics) 、 Amplitude 、 Physics 、 Monte Carlo method
摘要: We investigate the effect of evolution energy longitudinal spin fluctuations on helimagnetic transition and specific heat in a Heisenberg magnet with Dzyaloshinskii-Moriya interaction that may arise result applied pressure. Using classical Monte Carlo calculations for spin-lattice Hamiltonian accounting variable amplitudes we find helical phase is pretty robust against fluctuations. At same time amplitude fluctuation hump seen dependence at [Formula: see text] its position are significantly affected. Depending mode either shifts to lower or higher temperatures increasing
harvard.edu
sci-hub.se 参考文章(50)
C. Pfleiderer, M. Janoschek, M. Garst, A. Bauer, P. Krautscheid, R. Georgii, P. Böni, Fluctuation-induced first-order phase transition in Dzyaloshinskii-Moriya helimagnets Physical Review B. ,vol. 87, pp. 134407- ,(2013) , 10.1103/PHYSREVB.87.134407
A E Petrova, S M Stishov, Ultrasonic studies of the magnetic phase transition in MnSi Journal of Physics: Condensed Matter. ,vol. 21, pp. 196001- ,(2009) , 10.1088/0953-8984/21/19/196001
S. Muhlbauer, B. Binz, F. Jonietz, C. Pfleiderer, A. Rosch, A. Neubauer, R. Georgii, P. Boni, Skyrmion Lattice in a Chiral Magnet Science. ,vol. 323, pp. 915- 919 ,(2009) , 10.1126/SCIENCE.1166767
S. V. Grigoriev, S. V. Maleyev, E. V. Moskvin, V. A. Dyadkin, P. Fouquet, H. Eckerlebe, Crossover behavior of critical helix fluctuations in MnSi Physical Review B. ,vol. 81, pp. 144413- ,(2010) , 10.1103/PHYSREVB.81.144413
A. L. Wysocki, J. K. Glasbrenner, K. D. Belashchenko, Thermodynamics of itinerant magnets in a classical spin-fluctuation model Physical Review B. ,vol. 78, pp. 184419- ,(2008) , 10.1103/PHYSREVB.78.184419
C. Pfleiderer, D. Reznik, L. Pintschovius, H. v. Löhneysen, M. Garst, A. Rosch, Partial order in the non-Fermi-liquid phase of MnSi Nature. ,vol. 427, pp. 227- 231 ,(2004) , 10.1038/NATURE02232
A. Bauer, C. Pfleiderer, Magnetic phase diagram of MnSi inferred from magnetization and ac susceptibility Physical Review B. ,vol. 85, pp. 214418- ,(2012) , 10.1103/PHYSREVB.85.214418
M. Blume, Theory of the First-Order Magnetic Phase Change in U O 2 Physical Review. ,vol. 141, pp. 517- 524 ,(1966) , 10.1103/PHYSREV.141.517
E. Moskvin, S. Grigoriev, V. Dyadkin, H. Eckerlebe, M. Baenitz, M. Schmidt, H. Wilhelm, Complex chiral modulations in FeGe close to magnetic ordering. Physical Review Letters. ,vol. 110, pp. 077207-1- 077207-5 ,(2013) , 10.1103/PHYSREVLETT.110.077207
S. Shallcross, A. E. Kissavos, V. Meded, A. V. Ruban, Anab initioeffective Hamiltonian for magnetism including longitudinal spin fluctuations Physical Review B. ,vol. 72, pp. 104437- ,(2005) , 10.1103/PHYSREVB.72.104437