Antiferromagnetic MnNi tips for spin-polarized scanning probe microscopy

Spin-polarized scanning tunneling microscopy (SP-STM) measures magnetoresistance with atomic resolution. While various methods for achieving SP probes have been developed, each is limited with respect to fabrication, performance, and operating conditions. In this study, we present the fabrication and use of SP-STM tips made from commercially available antiferromagnetic Mn88Ni12 foils. The tips are intrinsically SP, which is attractive for exploring magnetic phenomena in the zero field limit. The tip material is relatively ductile, is straightforward to etch, and has a Neel temperature exceeding 300 K. We benchmark the topographic and spectroscopic performance of our tips and demonstrate their spin sensitivity by measuring the two-state switching of holmium single atom magnets on MgO/Ag(100). Published by AIP Publishing.


Published in:
Review Of Scientific Instruments, 89, 12, 123706
Year:
Dec 01 2018
Publisher:
Melville, AMER INST PHYSICS
ISSN:
0034-6748
1089-7623
Keywords:
Laboratories:




 Record created 2019-01-23, last modified 2019-03-26


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