Premium
Magnetic Entropy Scaling in Ferromagnetic Semiconductor CrGeTe 3
Author(s) -
Sun Yan,
Luo Xuan
Publication year - 2019
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.201900052
Subject(s) - magnetic refrigeration , condensed matter physics , ferromagnetism , scaling , magnetic field , anisotropy , exponent , physics , materials science , magnetization , optics , quantum mechanics , mathematics , geometry , linguistics , philosophy
The magnetocaloric effect and the magnetic entropy (Δ S M ( T , H )) scaling around the magnetic transition temperature ( T C ) have been investigated in two‐dimensional ferromagnetic semiconductor (2D FS) CrGeTe 3 single crystal. The Δ S M ( T , H ) and the relative cooling power (RCP) are about 3.21 J kg −1 K −1 and 94.3 J kg −1 under applied magnetic field H = 4.5 T, respectively. The Δ S M ( T , H ) under different magnetic fields can be scaled into a single curve independent of external field and temperature. Meanwhile, it has been found that Δ S M ( T , H ) follows the power law of H n with n ( T , H ) = d ln |S Δ M ( T , H )|/ d ln( H ). Critical parameters n , l , and m have been obtained based on Δ S M ( T , H ). It has been found that the temperature‐dependent n at different magnetic fields scales into one universal line above T C , deviating from the scaling line at low temperature. This deviation can be attributed to the strong uniaxial anisotropy effect in CrGeTe 3 . This work figures out the magnetocaloric behavior of CrGeTe 3 , and will be helpful for understanding the origin of the ferromagnetism of similar 2D FSs.