Atomic magnetometers for materials characterization

作者：Romalis Michael V^*; Dang Hoan B

来源：Materials Today, 2011, 14(6): 258-262.

DOI：10.1016/s1369-7021(11)70140-7

Sensitive magnetometry has been established as a powerful technique for the characterization and testing of materials, with the most demanding applications relying on SQUID magnetometers operating at cryogenic temperatures. The recent development of compact, non-cryogenic atomic magnetometers with sub-femtotesla sensitivity and easy sample access has opened up a number of new possibilities. We give examples of sample thermal demagnetization measurements with sensitivity better than 10(-9) emu/Hz(1/2) up to 420 degrees C and of magnetic detection of water droplets on an aluminum surface. Recent research on magnetometry with laser-cooled atoms and color centers in diamond promises to extend the reach of atomic magnetic sensors to the micro-and nanoscale.

• 出版日期2011-6