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SUMMARY:XANES investigation of  the chromium dichalcogenides  CuCr<sub>1-x
 </sub>M’S<sub>2</sub> and MCrX<sub>2</sub>
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20260711T061248Z
UID:indico-contribution-1281@indico.inp.nsk.su
DESCRIPTION:Speakers: Evgeniy Korotaev (Nikolaev Institute of Inorganic Ch
 emistry  of the Siberian Branch of the Russian Academy of Sciences)\nThe c
 hromium dichalcogenides MCrX2 (M = Cu\, Ag\, Na\, X = O\, S\, Se) are prom
 ising  materials for modern electronics. These materials have the potentia
 l properties for practical usage : ionic conductivity [1]\, thermoelectric
  properties [2]\, magnetic arrangement[3-4]\, colossal magnetoresistance\,
  phase metal-insulator transition [4].\nThere are several different ways o
 f purposeful control of electric and magnetic properties of the chromium d
 ichalcogenides MCrX2: cationic substitution of the chromium atoms with van
 adium\, iron or manganese atoms (CuCr1-xM'xS2\, M' = V\, Fe\, Mn)\, co-int
 ercalation of different kinds of atoms into the van-der-waals gap (for exa
 mple silver in the Cu1-xAgxCrS2)\, changing type of the chalcogen (CuCrX2\
 , X = S\, Se\, Te).\nSynthesis of functional materials based on MCrX2 with
  necessary properties requires distribution control of atoms on the crysta
 llographic positions in the crystal lattice. This parameter essentially de
 pends on technology of synthesis. In this regard\, it is appropriate to us
 e physical methods sensitive to the character of the local environment of 
 atoms in synthesized samples. The XANES-spectroscopy can be used as such m
 ethod (XANES - X-ray Near Edge Structure).\nIn the present study a complex
  experimental and theoretical investigation of the XANES-structures of X-r
 ay absorption K-edges of intercalated MCrX2 (M = Cu\, Ag\, X = O\, S\, Se)
  and cation-substituted dichalcogenides CuCr1-xM'xS2\, (M' = V\, Fe\, x = 
 0-0.40) have been carried out. Based on these data the influence of cation
  substitution of chromium atoms and the influence of types of the chalcoge
 ns and the intercalates to the near fine structure of X-ray absorption spe
 ctra of the elements in the dichalcogenides CuCr1-xVxS2 and MCrX2 (M = Cu\
 , Ag\, X = O\, S\, Se) have been investigated.\nThe reported investigation
  was funded by RFBR according to the research\n project No. 16-32-00612.\n
 [1] Almukhametov R.F.\, Yakshibaev R.A.\, Gabitov E.V. et al. // Phys. Sta
 t. Sol. (b). – 2003. – 236\, N 1. – P. 29 – 33.\n [2] Srivastana D
 .\, Tewari G.C.\, Kappinen M.\, Nieminen R.M. // J. Phys.: Condens.Matter.
  – 2013. –  25\, N. 3 – P. 105504.\n[3] Karmakar A.\, Dey K.\, Chatt
 erjee S. et al. // Appl. Phys. Letters. – 2014. –104\, N. 5. – P. 05
 2906.\n[4] Abramova G.M.\, Petrakovskii G.A. // Low Temperature Physics. 
 – 2006. – 32\, N. 8/9. – p. 954-967.\n\nhttps://indico.inp.nsk.su/ev
 ent/3/contributions/1281/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1281/
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