English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Photoelectron diffraction for probing valency and magnetism of 4 f-based materials: A view on valence-fluctuating EuIr2Si2

Usachov, D. Y., Tarasov V, A., Schulz, S., Bokai, K. A., Tupitsyn, I. I., Poelchen, G., et al. (2020). Photoelectron diffraction for probing valency and magnetism of 4 f-based materials: A view on valence-fluctuating EuIr2Si2. Physical Review B, 102(20): 205102, pp. 1-11. doi:10.1103/PhysRevB.102.205102.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/21.11116/0000-0007-7D5D-6 Version Permalink: http://hdl.handle.net/21.11116/0000-0007-7D5F-4
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Usachov, D. Yu.1, Author
Tarasov V, A.1, Author
Schulz, S.1, Author
Bokai, K. A.1, Author
Tupitsyn, I. I.1, Author
Poelchen, G.1, Author
Seiro, S.1, Author
Caroca-Canales, N.2, Author              
Kliemt, K.1, Author
Mende, M.1, Author
Kummer, K.1, Author
Krellner, C.1, Author
Muntwiler, M.1, Author
Li, Hang1, Author
Laubschat, C.1, Author
Geibel, C.3, Author              
Chulkov V, E.1, Author
Fujimori I, S.1, Author
Vyalikh, D. V.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
3Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863465              

Content

show
hide
Free keywords: -
 Abstract: We present and discuss the methodology for modeling 4 f photoemission spectra, 4 f photoelectron diffraction (PED) patterns, and magnetic dichroism effects for rare-earth-based materials. Using PED and magnetic dichroism in photoemission, we explore the electronic and magnetic properties of the near-surface region of the valence-fluctuating material EuIr2Si2. For the Eu-terminated surface, we found that the topmost Eu layer is divalent and exhibits a ferromagnetic order below 10 K. The valency of the next Eu layer, that is the fifth atomic layer, is about 2.8 at low temperature that is close to the valency in the bulk. The properties of the Si-terminated surface are drastically different. The first subsurface Eu layer (fourth atomic layer below the surface) behaves divalently and orders ferromagnetically below 48 K. Experimental data indicate, however, that there is an admixture of trivalent Eu in this layer, resulting in its valency of about 2.1. The next deeper lying Eu layer (eighth atomic layer below the surface) behaves mixed valently, but the estimated valency of 2.4 is notably lower than the value in the bulk. The presented approach and obtained results create a background for further studies of exotic surface properties of 4 f -based materials, and allow us to derive information related to valency and magnetism of individual rare-earth layers in a rather extended area near the surface.

Details

show
hide
Language(s): eng - English
 Dates: 2020-11-022020-11-02
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 102 (20) Sequence Number: 205102 Start / End Page: 1 - 11 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008