In-plane electronic anisotropy in underdoped Ba(Fe1-xCo x)2As2 revealed by partial detwinning in a magnetic field

Physical Review B - Condensed Matter and Materials Physics

Volumn 81, Issue 21, 2010, Pages

  Chu, Jiun Haw ^a,b   Analytis, James G ^a,b   Press, David ^c   De Greve, Kristiaan ^c   Ladd, Thaddeus D ^c,d,e   Yamamoto, Yoshihisa ^c,d   Fisher, Ian R ^a,b  

^a STANFORD UNIVERSITY   (United States)

^b SLAC NATIONAL ACCELERATOR LABORATORY   (United States)

^c STANFORD UNIVERSITY   (United States)

^d NATIONAL INSTITUTE OF INFORMATICS   (Japan)

^e Hughes Aircraft Co   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 77955908263     PISSN: 10980121     EISSN: 1550235X     Source Type: Journal    
DOI: 10.1103/PhysRevB.81.214502     Document Type: Article

References (18)

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11. -3emu/mol ) (Ref.), therefore the difference in demagnetization along different directions is negligible.
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13. Variation in the absolute value of the MR for different samples with the same Co concentration indicates that the extent of the partial detwinning effect that we observe depends sensitively on extrinsic parameters, including strain. Consequently, we do not associate any significance to the difference in the MR between samples with different Co concentrations.
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15. Partial detwinning reduces the twin boundary density and therefore presumably decreases the contribution to the overall scattering rate from twin boundary scattering. However this effect cannot explain the permanent increase in resistivity for fields parallel to the current at low temperature. Moreover the twin boundaries extend along orthorhombic [110] direction (Refs.) hence any scattering process would contribute equally to the resistivity along a and b axes, inconsistent with the observed anisotropy.
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