Variation of Physical Properties in the Nominal Sr4V2O6Fe2As2

Journal Article · Sat Jan 01 00:00:00 EST 2011 · Physica C

DOI:https://doi.org/10.1016/j.physc.2011.01.004· OSTI ID:1006480

Sefat, A. S. ^[1]; Garlea, Vasile O ^[2]; Singh, David J ^[2]; McGuire, Michael A ^[2]; Sales, Brian C ^[2]; Zuev, Yuri L ^[2]

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1. Oak Ridge National Laboratory (ORNL)
2. ORNL

We show using a combination of powder X-ray and neutron diffraction, first principles calculations, temperature- and field-dependent magnetization, heat capacity and resistivity data that the superconducting behavior of Sr4V2O6Fe2As2 is dependent on synthesis conditions, particularly, heating profiles result in unintentional chemical doping. This compound can be tuned from a state in which the vanadium electrons are itinerant with a high electronic density of states, to a state where the vanadium-oxide layers are insulating and presumably magnetic.

• 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: 1006480
• Journal Information: Physica C, Vol. 471, Issue 5-6; ISSN 0921-4534
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BEHAVIOR
DATA
DENSITY
ELECTRONS
HEATING
LAYERS
MAGNETIZATION
NEUTRON DIFFRACTION
PHYSICAL PROPERTIES
POWDERS
SPECIFIC HEAT
SYNTHESIS
VANADIUM
VARIATIONS