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Quantum Griffiths phase in disordered Mn1−xFexSi
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Mishra, Ashish Kumar, Samatham, S. Shanmukharao, Telling, Mark T. F., Hillier, A. D., Lees, Martin R., Suresh, K. G. and Ganesan, V. (2023) Quantum Griffiths phase in disordered Mn1−xFexSi. Physical Review B (Condensed Matter and Materials Physics), 107 (10). L100405. doi:10.1103/PhysRevB.107.L100405 ISSN 1098-0121.
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Official URL: https://link.aps.org/doi/10.1103/PhysRevB.107.L100...
Abstract
We show the presence of magnetic rare regions consistent with the quantum Griffiths phase in Fe-doped MnSi using detailed heat capacity, magnetization, and muon spin relaxation (μSR) measurements down to millikelvin temperatures. The slow dynamics of these rare regions at low temperatures leads to the non-Fermi-liquid behavior in heat capacity and magnetization. The μSR and magnetization results further indicate that the dynamics freezes into a cluster-glass state below Tf ∼ 1.25 K. The results are in agreement with theoretical models proposed in the literature for metallic systems with Heisenberg symmetry that exhibit the quantum Griffiths phase in the presence of strong disorder.
Item Type: | Journal Article | |||||||||||||||
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Subjects: | Q Science > QC Physics | |||||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||||||||
Library of Congress Subject Headings (LCSH): | Phase transformations (Statistical physics), Quantum theory, Muon spin rotation, Magnetism | |||||||||||||||
Journal or Publication Title: | Physical Review B (Condensed Matter and Materials Physics) | |||||||||||||||
Publisher: | American Physical Society | |||||||||||||||
ISSN: | 1098-0121 | |||||||||||||||
Official Date: | 7 March 2023 | |||||||||||||||
Dates: |
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Volume: | 107 | |||||||||||||||
Number: | 10 | |||||||||||||||
Article Number: | L100405 | |||||||||||||||
DOI: | 10.1103/PhysRevB.107.L100405 | |||||||||||||||
Status: | Peer Reviewed | |||||||||||||||
Publication Status: | Published | |||||||||||||||
Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||
Copyright Holders: | © 2023 American Physical Society | |||||||||||||||
Date of first compliant deposit: | 16 March 2023 | |||||||||||||||
Date of first compliant Open Access: | 20 March 2023 | |||||||||||||||
RIOXX Funder/Project Grant: |
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