Barium iron arsenide, barium cobalt arsenide, barium nickel arsenide single crystals and superconductivity upon cobalt doping

Journal Article · Thu Jan 01 00:00:00 EST 2009 · Physica C

OSTI ID:956374

Ronning, Filip ^[1]; Sefat, A S ^[2]; Mcguire, M M ^[2]; Sales, B ^[2]; Jin, R ^[2]; Mandrus, D ^[2]

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1. Los Alamos National Laboratory
2. ORNL

The crystal structure and physical properties of BaFe{sub 2}As{sub 2}, BaCo{sub 2}As{sub 2}, and BaNi{sub 2}As{sub 2} single crystals are surveyed. BaFe{sub 2}As{sub 2} gives a magnetic and structural transition at T{sub N} = 132(1) K, BaCo{sub 2}As{sub 2} is a paramagnetic metal, while BaNi{sub 2}As{sub 2} has a structural phase transition at T{sub 0} = 131 K, followed by superconductivity below {Tc} = 0.69 K. The bulk superconductivity in Co-doped BaFe{sub 2}As{sub 2} below {Tc} = 22 K is demonstrated by resistivity, magnetic susceptibility, and specific heat data. In contrast to the cuprates, the Fe-based system appears to tolerate considerable disorder in the transition metal layers. First principles calculations for BaFe{sub 1.84}Co{sub 0.16}As{sub 2} inter-band scattering due to Co is weak.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 956374
• Report Number(s): LA-UR-09-00666; LA-UR-09-666; TRN: US201013%%84
• Journal Information: Physica C, Journal Name: Physica C
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM
COBALT
COBALT ARSENIDES
CRYSTAL STRUCTURE
IRON ARSENIDES
MAGNETIC SUSCEPTIBILITY
NICKEL ARSENIDES
PHYSICAL PROPERTIES
SPECIFIC HEAT
SUPERCONDUCTIVITY
MONOCRYSTALS