Thermal and Transport Behavior of Single Crystalline R2CoGa8 R = Gd, Tb, Dy, Ho, Er, Tm, Lu and Y Compounds - Condensed Matter > Strongly Correlated ElectronsReport as inadecuate




Thermal and Transport Behavior of Single Crystalline R2CoGa8 R = Gd, Tb, Dy, Ho, Er, Tm, Lu and Y Compounds - Condensed Matter > Strongly Correlated Electrons - Download this document for free, or read online. Document in PDF available to download.

Abstract: The anisotropy in electrical transport and thermal behavior of singlecrystalline R$ {2}$CoGa$ {8}$ series of compounds is presented.
These compoundscrystallize in a tetragonal structure with space gropup P4-mmm.
The nonmagneticcounterparts of the series namely Y$ {2}$CoGa$ {8}$ and Lu$ {2}$CoGa$ {8}$showa behavior consistent with the low density of states at the fermi level.
InY$ {2}$CoGa$ {8}$, a possibility of charge density wave transition is observedat $\approx$ 30 K.
Gd$ {2}$CoGa$ {8}$ and Er$ {2}$CoGa$ {8}$ show a presence ofshort range correlation above the magnetic ordering temperature of thecompound.
In case of Gd$ {2}$CoGa$ {8}$, the magnetoresistance exhibits asignificant anisotropy for current parallel to {}100{} and {}001{}directions.
Compounds with other magnetic rare earths R = Tb, Dy, Ho and Tmshow the normal expected magnetic behavior whereas Dy$ {2}$CoGa$ {8}$ exhibitsthe possibility of charge density wave CDW transition at approximately sametemperature as that of Y$ {2}$CoGa$ {8}$.
The thermal property of thesecompounds is analysed on the basis of crystalline electric field CEFcalculations.



Author: Devang A.
Joshi, A.
K.
Nigam, S.
K.
Dhar, A.
Thamizhavel


Source: https://arxiv.org/



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