English
 
User Manual Privacy Policy Disclaimer Contact us
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
  Magnetic resonance spectroscopy on the spin-frustrated magnets YBaCo3MO7 (M = Al, Fe)

Iakovleva, M., Zimmermann, S., Zeisner, J., Alfonsov, A., Grafe, H.-J., Valldor, M., et al. (2017). Magnetic resonance spectroscopy on the spin-frustrated magnets YBaCo3MO7 (M = Al, Fe). Physical Review B, 96(6): 064417, pp. 1-11. doi:10.1103/PhysRevB.96.064417.

Item is

Basic

show hide
Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-D716-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0001-9CC9-D
Genre: Journal Article

Files

show Files

Locators

show

Creators

show
hide
 Creators:
Iakovleva, M.1, Author
Zimmermann, S.1, Author
Zeisner, J.1, Author
Alfonsov, A.1, Author
Grafe, H.-J.1, Author
Valldor, M.2, Author              
Vavilova, E.1, Author
Buechner, B.1, Author
Kataev, V.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Martin Valldor, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863454              

Content

show
hide
Free keywords: -
 Abstract: We present experimental results of combined electron spin resonance (ESR) and nuclear magnetic resonance (NMR) measurements on single crystals of the Swedenborgite-type compounds YBaCo3MO7 (M=Al, Fe). The magnetic lattice of these materials can be described as stacks of strongly geometrically frustrated kagome layers built up of Co2+ (S = 3/2) ions. Due to the Co-M site intermixing, there are M-type defects in the kagome planes as well as magnetic Co ions at the interplanar positions. Previous investigations revealed large antiferromagnetic (AFM) Curie-Weiss temperatures in both compounds. Yet no AFM long-range order but a spin glass behavior at low temperatures has been observed. Using (27)AlNMRas well as Co2+ and Fe3+ ESR spin probes that are sensitive to local magnetic properties at different crystallographic sites, we have identified two magnetic subsystems in both compounds and have studied their distinct properties. In particular in the case of YBaCo3AlO7, we have observed a gradual development of the spin correlations in the two-dimensional (2D) kagome planes containing nonmagnetic Al defects and the establishment of a 3D frozen glasslike spin state of the interplanar Co ions at lower temperatures. We have found that despite a strong dependence of the ordering temperature in the kagome layers on the type of the M ion (magnetic or nonmagnetic), the final 3D static ground state sets in at rather similar temperatures. We argue that the peculiar spin dynamics and a disordered magnetic ground state of the studied compounds result from the interplay of strong magnetic frustration and intrinsic structural disorder arising due to the intersite mixing of Co and M atoms.

Details

show
hide
Language(s): eng - English
 Dates: 2017-08-142017-08-14
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 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: 96 (6) Sequence Number: 064417 Start / End Page: 1 - 11 Identifier: ISSN: 1098-0121
CoNE: /journals/resource/954925225008