Competing magnetic ground states in nonsuperconducting Ba(Fe1-xCrx)2As2 as seen via neutron diffraction

Journal Article · Sat Jan 01 04:00:00 EST 2011 · Physical Review B

DOI:https://doi.org/10.1103/PhysRevB.83.060509· OSTI ID:1010594

Marty, Karol J ^[1]; Christianson, Andrew D ^[1]; Wang, C H ^[2]; Matsuda, Masaaki ^[1]; Cao, Huibo ^[1]; VanBebber, L. H. ^[3]; Zarestky, Jerel L ^[1]; Singh, David J ^[1]; Sefat, A. S. ^[2]; Lumsden, Mark D ^[1]

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1. ORNL
2. Oak Ridge National Laboratory (ORNL)
3. University of Tennessee, Knoxville (UTK)

We present neutron diffraction measurements on single-crystal samples of nonsuperconducting Ba(Fe{sub 1-x}Cr{sub x}){sub 2}As{sub 2} as a function of Cr doping for 0 {le} x {le} 0.47. The average spin-density-wave moment is independent of concentration for x {le} 0.2 and decreases rapidly for x {ge} 0.3. For concentrations in excess of 30% chromium, we find a new competing magnetic phase consistent with G-type antiferromagnetism which rapidly becomes the dominant magnetic ground state. Strong magnetism is observed for all concentrations measured, naturally explaining the absence of superconductivity in the Cr-doped materials.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1010594
• Journal Information: Physical Review B, Journal Name: Physical Review B Journal Issue: 6 Vol. 83; ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ANTIFERROMAGNETISM
CHROMIUM
GROUND STATES
MAGNETISM
NEUTRON DIFFRACTION
SUPERCONDUCTIVITY