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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/66191
Record Status
Checked
Record Id
66191
Title
Magnetic fluctuations and spin freezing in nonsuperconducting LiFeAs derivatives
Contributors
JD Wright
,
MJ Pitcher
,
W Trevelyan-Thomas
,
T Lancaster
,
PJ Baker (STFC Rutherford Appleton Lab.)
,
FL Pratt (STFC Rutherford Appleton Lab.)
,
SJ Clarke
,
SJ Blundell
Abstract
We present detailed magnetometry and muon-spin rotation data on polycrystalline samples of overdoped, nonsuperconducting LiFe1−xNixAs (x=0.1,0.2) and Li1−yFe1+yAs (0≤y≤0.04) as well as superconducting LiFeAs. While LiFe1−xNixAs exhibits weak antiferromagnetic fluctuations down to 1.5 K, Li1−yFe1+yAs samples, which have a much smaller deviation from the 1:1:1 stoichiometry, show a crossover from ferromagnetic to antiferromagnetic fluctuations on cooling and a freezing of dynamically fluctuating moments at low temperatures. We do not find any signatures of time-reversal symmetry breaking in stoichiometric LiFeAs that would support recent predictions of triplet pairing.
Organisation
ISIS
,
ISIS-MuSR
,
STFC
Keywords
ISIS 2013
Funding Information
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Licence Information:
Language
English (EN)
Type
Details
URI(s)
Local file(s)
Year
Journal Article
Phys Rev B
88, no. 6 (2013): 060401(R).
doi:10.1103/PhysRevB.88.060401
2013
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