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  Putative quantum critical point in the itinerant magnet ZrFe4Si2 with a frustrated quasi-one-dimensional structure

Ajeesh, M. O., Weber, K., Geibel, C., & Nicklas, M. (2020). Putative quantum critical point in the itinerant magnet ZrFe4Si2 with a frustrated quasi-one-dimensional structure. Physical Review B, 102(18): 184403, pp. 1-8. doi:10.1103/PhysRevB.102.184403.

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 Creators:
Ajeesh, M. O.1, Author              
Weber, K.1, Author              
Geibel, C.2, Author              
Nicklas, M.3, Author              
Affiliations:
1Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
2Christoph Geibel, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863465              
3Michael Nicklas, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863472              

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 Abstract: The Fe sublattice in the compound ZrFe4Si2 features geometrical frustration and quasi-one-dimensionality. We therefore investigated the magnetic behavior in ZrFe4Si2 and its evolution upon substituting Ge for Si and under the application of hydrostatic pressure using structural, magnetic, thermodynamic, and electrical-transport probes. Magnetic measurements reveal that ZrFe4Si2 holds paramagnetic Fe moments with an effective moment mu(eff) = 2.18 mu(B). At low temperatures the compound shows a weak short-range magnetic order below 6 K. Our studies demonstrate that substituting Ge for Si increases the unit-cell volume and stabilizes the short-range order into a long-range spin-density wave type magnetic order. On the other hand, hydrostatic pressure studies using electrical-resistivity measurements on ZrFe4(Si0.88Ge0.12)(2) indicate a continuous suppression of the magnetic ordering upon increasing pressure. Therefore, our combined chemical substitution and hydrostatic pressure studies suggest the existence of a lattice-volume-controlled quantum critical point in ZrFe4Si2.

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Language(s): eng - English
 Dates: 2020-11-052020-11-05
 Publication Status: Published in print
 Pages: -
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 Rev. Type: -
 Identifiers: DOI: 10.1103/PhysRevB.102.184403
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 102 (18) Sequence Number: 184403 Start / End Page: 1 - 8 Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008