Cryogenic scanning Hall-probe microscope with centimeter scan range and submicron resolution

被引：36

作者：

Dinner, RB ^{[1
]}

Beasley, MR ^{[1
]}

Moler, KA ^{[1
]}

机构：

[1] Stanford Univ, Geballe Lab Adv Mat, Stanford, CA 94305 USA

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 2005年 / 76卷 / 10期

关键词：

D O I：

10.1063/1.2072438

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We have constructed a scanning Hall-probe microscope that combines a 1x4 cm scan range with 200 nm positioning resolution by coupling stepper motors to high-resolution drivers and reducing gears. The instrument is uniquely suited for efficient magnetic imaging of mesoscopic devices, media, and materials, operating from 4 K to room temperature with fast turn-around time. Its potential for studying dissipation in coated conductors-high-T-c superconducting tapes-is demonstrated via model systems. We image an entire sample of YBa2Cu3O7-delta, then zoom in to individual fluxons. Flux penetration into a single artificial grain boundary is imaged with 4x10(-3) G/root Hz field resolution and 25 mu s time resolution by averaging over cycles of ac driving current. Using the resulting magnetic movie, we map out ac power losses.

引用

页码：1 / 11

页数：11