High sensitivity magnetization measurements of nanoscale cobalt clusters

被引：60

作者：

Wernsdorfer, W

Hasselbach, K

Benoit, A

Wernsdorfer, W

Barbara, B

Mailly, D

Tuaillon, J

Perez, JP

Dupuis, V

Dupin, JP

Guiraud, G

Perex, A

机构：

[1] CNRS,LAB LOUIS NEEL,F-38042 GRENOBLE 9,FRANCE

[2] CNRS,MICROSTRUCT & MICROELECTR LAB,F-92220 BAGNEUX,FRANCE

[3] UNIV LYON 1,DEPT MAT PHYS,F-69622 VILLEURBANNE,FRANCE

来源：

JOURNAL OF APPLIED PHYSICS | 1995年 / 78卷 / 12期

关键词：

D O I：

10.1063/1.360429

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Presented is a novel high sensitivity magnetometer allowing us to measure the magnetization reversal of about 10(4) mu(beta) corresponding to a sensitivity of about 10(-16) emu. The detector is a niobium micro-bridge DC superconducting quantum interference device (SQUID), fabricated using electron-beam lithography. It is operational in the temperature range of 0-7 K. Furthermore, we present a method to deposit on the SQUID loop a small number of Co clusters of about 2-5 nm in diameter. The first results obtained on these samples show that there is still a ferromagnetic coupling between the clusters and the magnetization reversal takes place by small avalanches. (C) 1995 American Institute of Physics.

引用

页码：7192 / 7195

页数：4

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