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Investigation of chiral phases near helical ordering temperature in MnSi
Author(s) -
Samatham S. Shanmukharao,
Ganesan V.
Publication year - 2015
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.201451462
Subject(s) - condensed matter physics , phase diagram , magnon , skyrmion , electrical resistivity and conductivity , electron , phase (matter) , materials science , atmospheric temperature range , anomaly (physics) , coupling (piping) , physics , ferromagnetism , thermodynamics , quantum mechanics , metallurgy
Chiral modulation crossovers and phase transitions of MnSi in the vicinity of the long‐range magnetic ordering temperature are investigated. Notable anomalies in specific heat as a function of magnetic fields that directly correspond to the speculated chiral modulations in the precursor region are observed. The magneto‐thermal ( H – T ) phase diagram reveals the existence of repulsive, attractive, and confined skyrmion phases. Resistivity analysis suggests strong electron–magnon coupling as well as the possibility of strong electron correlations in MnSi supported by the Kadowaki–Woods ratio ( A / γ 2 ), which is close to that of moderate heavy Fermion metals.