[21p-W833-1~13] 11.4 Analog applications and their related technologies

[21p-W833-6] Local magnetic measurements over sample surface by distance modulation in an STM-SQUID microscope

〇Yuji Miyato¹, Takuya Ashizuka¹, Hideo Itozaki¹ (1.Osaka Univ.)

Keywords:SQUID,Scanning probe microscopy,Magnetic image

We have developed an STM-SQUID microscope, in which an rf-SQUID is combined with a scanning tunneling microscope (STM). When the raw SQUID output is mapped as the magnetic image, this normal image tends to be unclear due to the influence of the background magnetic field far from the sample surface. In this study, the local magnetic field near the sample surface was selectively mapped using lock-in detection with modulation of the probe-sample distance during the acquisition. The obtained magnetic image was clearer than the normal image.