nitrogen-vacancy centre microscope

Diamonds make for a vacant image

The nitrogen-vacancy centre microscope is a recent development which offers a useful halfway house between MFM and XMCDPEEM in terms of both resolution and kit requirements. More importantly it also gives a stronger signal when you want to image very thin (1nm) films, allowing devices made from these ultrathin films to be readily imaged.

The video goes from domain walls to magnetic tape RAM to finally talk about the fancy new magnetic imaging do-dad they’ve built at the Institute of Fundamental Electronics. This all links back to last week’s video since they use the spin in a diamond AFM tip with a nitrogen defect to detect the stray field from a Ta/CoFeB/MgO wire. They used a green laser to excite the spin and then read the result using the red light re-emmited from the nitrogen atom. The paper they describe the technique in is here.

One thing I like about this video is that each of its contributors has their own videos explaining their specialism in more detail. They seem to have used these longer videos so the fast talking man can give a quick summary of what they’re saying, but still keep the detail for those who want it, something the recent Alan Turing film could have used…

Original Paper:

Science 20 June 2014: Vol. 344 no. 6190 pp. 1366-1369