Competing magnetic ground states in non-superconducting Ba(Fe1-xCrx)2As2

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

OSTI ID:1006464

Marty, Karol J ^[1]; Christianson, Andrew D ^[1]; Wang, Cuihuan ^[1]; Matsuda, Masaaki ^[1]; Cao, Huibo ^[1]; VanBebber, L. H. ^[2]; Zaretsky, Jerel L. ^[3]; Singh, David J ^[1]; Sefat, A. S. ^[4]; Lumsden, Mark D ^[1]

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1. ORNL
2. University of Tennessee, Knoxville (UTK)
3. Ames Laboratory and Iowa State University
4. Oak Ridge National Laboratory (ORNL)

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 x 0.47. The average spin-density-wave moment is independent of concentration for x 0.2 and decreases rapidly for x 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 Lab. (ORNL), Oak Ridge, TN (United States). High Flux Isotope Reactor (HFIR)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: DE-AC05-00OR22725
• OSTI ID: 1006464
• Journal Information: Physical Review Letters, Vol. 83, Issue 6; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANTIFERROMAGNETISM
BARIUM COMPOUNDS
CHROMIUM
DENSITY
DOPED MATERIALS
FUNCTIONS
GROUND STATES
IRON ARSENIDES
MAGNETISM
MATERIALS
MONOCRYSTALS
NEUTRON DIFFRACTION
SPIN WAVES
SUPERCONDUCTIVITY