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Title: Long-range magnetic order in hydroxide-layer-doped ( Li 1 - x - y Fe x Mn y OD ) FeSe

Journal Article · · Physical Review Materials
 [1]; ORCiD logo [2];  [1];  [1];  [3]; ORCiD logo [3]; ORCiD logo [4];  [1];  [1]
  1. Univ. of Maryland, College Park, MD (United States)
  2. Univ. of Maryland, College Park, MD (United States); Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
  3. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

The (Li1-xFexOH)FeSe superconductor has been suspected of exhibiting long-range magnetic ordering due to Fe substitution in the LiOH layer. However, no direct observation such as magnetic reflection from neutron diffraction has been reported. Here, we use a chemical design strategy to manipulate the doping level of transition metals in the LiOH layer to tune the magnetic properties of the (Li1-x-yFexMnyOD)FeSe system. We find Mn doping exclusively replaces Li in the hydroxide layer resulting in enhanced magnetization in the (Li0.876Fe0.062Mn0.062OD)FeSe superconductor without significantly altering the superconducting behavior as resolved by magnetic susceptibility and electrical/thermal transport measurements. As a result, long-range magnetic ordering was observed below 12 K with neutron diffraction measurements. This work has implications for the design of magnetic superconductors for the fundamental understanding of superconductivity and magnetism in the iron chalcogenide system as well as exploitation as functional materials for next-generation devices.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Science Foundation (NSF); Air Force Research Laboratory (AFRL) - Air Force Office of Scientific Research (AFOSR); Gordon and Betty Moore Foundation; National Institute of Standards and Technology (NIST)
Grant/Contract Number:
AC02-06CH11357; AC05-00OR22725
OSTI ID:
1606363
Journal Information:
Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 3 Vol. 4; ISSN PRMHAR; ISSN 2475-9953
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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