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SUMMARY:Characteristic of d-f states in DyNi2Mn and ErCo2Mn compounds  wit
 h strong electronic correlations by resonant photoemission
DTSTART;VALUE=DATE-TIME:20200713T141300Z
DTEND;VALUE=DATE-TIME:20200713T141400Z
DTSTAMP;VALUE=DATE-TIME:20260316T062722Z
UID:indico-contribution-1846@indico.inp.nsk.su
DESCRIPTION:Speakers: Ekaterina Ponomareva (M.N. Miheev Institute of Metal
  Physics UB RAS)\nInvestigation of intermetallic compounds have been incre
 asingly attractive due to their structural and magnetic properties and the
  possibility of developing new functional materials based on them. The com
 pounds RT2Mn (R = Dy\, Er\; T = Ni\, Co) crystallize in cubic MgCu2 – ty
 pe structure by alloying 3d transition metal (T) and rare-earth (R). Certa
 in amount of manganese is introduced in compounds of this type led to a ch
 ange in the characteristics of materials [1]. \nThe interplay of d-and f-e
 lements and its effect on the formation of the electronic structure in suc
 h compounds as DyNi2Mn and ErCo2Mn are studied. The method used resonant x
 -ray photoemission spectroscopy allows to select the contributions of the 
 various components in the valence bands (VB). We can study not only the gr
 ound state\, but also the lifetime of the excited (a core-level hole – V
 B electron) state\, determine energies of the VB single-particle states an
 d two-hole states at selected atoms\, see reactions to sudden appearance o
 f the core-level photo-hole. Resonant photoemission in narrow-band materia
 ls is described by the sum of first- and second order transitions\, their 
 quantum-mechanical interference leads to an increase in the spectrum from 
 the valence bands and the appearance of an asymmetric dependence on the ph
 oton energy. Recently\, these effects were studied theoretically and exper
 imentally using the example of three-component intermetallic compounds TbN
 i2Mnx [2]. The competition between the elastic and inelastic photoemission
  channels leads to a different dependence of photoemission spectra from ni
 ckel and manganese on photon energy. The elastic channel is realized on at
 oms with large magnetic moments\, the inelastic Auger decay occurs on atom
 s with small moments.\nThe research was supported by RFBR project № 20-0
 2-00541.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1846/
LOCATION:
URL:https://indico.inp.nsk.su/event/24/contributions/1846/
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