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Direct observation of quantized interlayer vortex flow in a high- single crystal
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10.1063/1.2815659
/content/aip/journal/apl/91/20/10.1063/1.2815659
http://aip.metastore.ingenta.com/content/aip/journal/apl/91/20/10.1063/1.2815659
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) A series of magnetic images (top view) of the surface of (100) oriented single crystal at different transport currents at in the scanning area of . The transport currents for (a)–(h) are 0, 0.2, 0.5, 0.7, 0.9, 1.0, 1.06, and , respectively. With increasing the transport current, the observed magnetic images only slightly changed below due to flux creep phenomenon. At , a continuous bandlike magnetic image suddenly appeared, indicating the occurrence of flux flow motion.

Image of FIG. 2.
FIG. 2.

(Color online) (a) SSM magnetic images (side view) at transport currents and for the LSCO single crystal. The flat magnetic signal which indicates the occurrence of flux flow is evident for image. (b) The SSM magnetic image (side view) in the wider region at . The A and C regions correspond to the flux flow region, while the B region corresponds to the flux pinned region. For higher currents, the B region was also switched from the pinned state to the flow state.

Image of FIG. 3.
FIG. 3.

(Color online) (a) Local magnetic amplitude at a specific point ( and ) in the scanning area as a function of -axis transport current. (b) SSM images (top view) corresponding to , 0.86, 0.92, 0.96, 0.98, 1.02, 1.04, and (from left to right). (c) Threshold current for flux flow as a function of the spatial position in the sample crystal. The horizontal bar represents the width of scattered data at the threshold in the region of . The result indicates that the pinning force is distributed inhomogeneously in the sample and the depinning process occurs little by little with increasing transport current.

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/content/aip/journal/apl/91/20/10.1063/1.2815659
2007-11-16
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Direct observation of quantized interlayer vortex flow in a high-TcLa1.87Sr0.13CuO4 single crystal
http://aip.metastore.ingenta.com/content/aip/journal/apl/91/20/10.1063/1.2815659
10.1063/1.2815659
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