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  Evolution of magnetic fluctuations through the Fe-induced paramagnetic to ferromagnetic transition in Cr2B

Arcon, D., Schoop, L. M., Cava, R. J., & Felser, C. (2016). Evolution of magnetic fluctuations through the Fe-induced paramagnetic to ferromagnetic transition in Cr2B. Physical Review B, 93(10): 104413, pp. 1-8. doi:10.1103/PhysRevB.93.104413.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002A-395F-F Version Permalink: http://hdl.handle.net/21.11116/0000-0001-007F-1
Genre: Journal Article

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 Creators:
Arcon, D.1, Author
Schoop, L. M.1, Author
Cava, R. J.1, Author
Felser, C.2, Author              
Affiliations:
1External Organizations, escidoc:persistent22              
2Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, escidoc:1863429              

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 Abstract: In itinerant ferromagnets, the quenched disorder is predicted to dramatically affect the ferromagnetic to paramagnetic quantum phase transition driven by external control parameters at zero temperature. Here we report a study on Fe-doped Cr2B, which, starting from the paramagnetic parent, orders ferromagnetically for Fe-doping concentrations x larger than x(c) = 2.5%. In parent Cr2B, B-11 nuclear magnetic resonance data reveal the presence of both ferromagnetic and antiferromagnetic fluctuations. The latter are suppressed with Fe doping, before the ferromagnetic ones finally prevail for x > x(c). Indications for non-Fermi-liquid behavior, usually associated with the proximity of a quantum critical point, were found for all samples, including undoped Cr2B. The sharpness of the ferromagneticlike transition changes on moving away from x(c), indicating significant changes in the nature of the magnetic transitions in the vicinity of the quantum critical point. Our data provide some constraints for understanding quantum phase transitions in itinerant ferromagnets in the limit of weak quenched disorder.

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Language(s): eng - English
 Dates: 2016-03-152016-03-15
 Publication Status: Published in print
 Pages: -
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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: 93 (10) Sequence Number: 104413 Start / End Page: 1 - 8 Identifier: ISSN: 1098-0121
CoNE: http://pubman.mpdl.mpg.de/cone/journals/resource/954925225008