Doping and Irradiation Controlled Vortex Pinning Behavior in BaFe2(As1-xPx)2 Single Crystals

L. Fang; Y. Jia; J. A. Schlueter; A. Kayani; Z. L. Xiao; H. Claus; U. Welp; A. E. Koshelev; G. W. Crabtree; W. -K. Kwok

doi:10.1103/PhysRevB.84.140504

Doping and Irradiation Controlled Vortex Pinning Behavior in BaFe2(As1-xPx)2 Single Crystals

Superconductivity 2015-05-28 v2

Authors: L. Fang , Y. Jia , J. A. Schlueter , A. Kayani , Z. L. Xiao , H. Claus , U. Welp , A. E. Koshelev , G. W. Crabtree , W. -K. Kwok

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Abstract

We report on the systematic evolution of vortex pinning behavior in isovalent doped single crystals of BaFe2(As1-xPx)2. Proceeding from optimal doped to ovedoped samples, we find a clear transfor- mation of the magnetization hysteresis from a fishtail behavior to a distinct peak effect followed by a reversible magnetization and Bean Livingston surface barriers. Strong point pinning dominates the vortex behavior at low fields whereas weak collective pinning determines the behavior at higher fields. In addition to doping effects, we show that particle irradiation by energetic protons can tune vortex pinning in these materials.

Keywords

vortex pinning BaFe2(As1-xPx)2 single crystals doping particle irradiation peak effect fishtail behavior

Cite

@article{arxiv.1106.2599,
  title  = {Doping and Irradiation Controlled Vortex Pinning Behavior in BaFe2(As1-xPx)2 Single Crystals},
  author = {L. Fang and Y. Jia and J. A. Schlueter and A. Kayani and Z. L. Xiao and H. Claus and U. Welp and A. E. Koshelev and G. W. Crabtree and W. -K. Kwok},
  journal= {arXiv preprint arXiv:1106.2599},
  year   = {2015}
}

Comments

4 pages, 4 figures,significant change of eraly version, accepted by PRB rapid communications

Doping and Irradiation Controlled Vortex Pinning Behavior in BaFe2(As1-xPx)2 Single Crystals

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