Miniature atomic magnetometer integrated with flux concentrators

被引：58

作者：

Griffith, W. Clark ^{[1
]}

Jimenez-Martinez, Ricardo ^{[1
]}

Shah, Vishal ^{[2
]}

Knappe, Svenja ^{[1
]}

Kitching, John ^{[1
]}

机构：

[1] NIST, Div Time & Frequency, Boulder, CO 80305 USA

[2] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 02期

关键词：

ferrites; magnetic flux; magnetic noise; magnetic permeability; magnetic relaxation; magnetic sensors; magnetisation; magnetometers; manganese compounds; zinc compounds; MAGNETIC-FIELD;

D O I：

10.1063/1.3056152

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

High permeability magnetic flux concentrators are used to enhance the sensitivity of an atomic magnetometer operating in the spin-exchange relaxation-free regime. The magnetometer uses a millimeter scale (87)Rb vapor cell and either mu-metal or Mn-Zn ferrite flux concentrators. The measured sensitivity gives excellent agreement with calculations of thermal noise from the concentrator material. The mu-metal concentrators allow a sensitivity of 50 fT Hz(-1/2), limited by thermal current magnetic noise. The ferrite concentrators are limited by thermal magnetization noise at low frequencies, and reach a sensitivity of 10 fT Hz(-1/2) for frequencies above 125 Hz.

引用

页数：3

共 12 条

[1] Ferromagnetic concentrator of a magnetic field for the planar HTSC SQUID [J].