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Small anisotropy, weak thermal fluctuations, and high field superconductivity in Co-doped iron pnictide
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10.1063/1.3081455
/content/aip/journal/apl/94/6/10.1063/1.3081455
http://aip.metastore.ingenta.com/content/aip/journal/apl/94/6/10.1063/1.3081455
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Magnetization hysteresis loops at 4.2, 7.5, 10, 12.5, 15, 17.5, and 20 K. Magnetic field was applied parallel to -axis.

Image of FIG. 2.
FIG. 2.

Magnetic field dependence of the in-plane critical current density . Triangles indicate broad maximum positions.

Image of FIG. 3.
FIG. 3.

Normalized flux pinning force as a function of reduced field . Dashed line represents the fitting curve . Inset shows as a function of field .

Image of FIG. 4.
FIG. 4.

In-plane resistivity as a function of temperatures under magnetic field of , 1, 3, 6, 9, 12, 15, 20, 25, 30, and 35 T. High field measurements above 15 T was performed using 45 T hybrid magnet.

Image of FIG. 5.
FIG. 5.

Magnetic phase diagram of the single crystal. Filled and open symbols represent defined by and , respectively. Circles and squares represent resistive parallel to the plane and -axis, respectively. Upward-pointing triangles represent the irreversibility field extrapolated from the pining force curves shown in Fig. 3. For , was estimated from the scaling of curves as described in the text. Downward-pointing triangles mark the field of the fish-tail peaks on magnetic hysteresis loops. The temperature dependencies of and the field of the fish-tail magnetization peak can be fitted with . Inset shows the temperature dependence of anisotropy parameter .

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/content/aip/journal/apl/94/6/10.1063/1.3081455
2009-02-13
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Small anisotropy, weak thermal fluctuations, and high field superconductivity in Co-doped iron pnictide Ba(Fe1−xCox)2As2
http://aip.metastore.ingenta.com/content/aip/journal/apl/94/6/10.1063/1.3081455
10.1063/1.3081455
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