Magnetic resonance force microscopy with a ferromagnetic tip mounted on the force detector

✍ Scribed by Z. Zhang; P.C. Hammel

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 152 KB
• Volume: 11
• Category: Article
• ISSN: 0926-2040
• DOI: 10.1016/s0926-2040(97)00097-0

✦ Synopsis

Ž

. The Magnetic Resonance Force Microscope MRFM presents the opportunity for a magnetic resonance imaging probe with ultra-high, potentially atomic-scale, resolution. The successful application of this technique in detection of nuclear Ž . magnetic, electron-spin and ferromagnetic resonance FMR highlights its significant potential. We discuss the capabilities of the MRFM with particular emphasis on the detection of FMR using MRFM techniques. A crucial remaining challenge in Ž . the development of the magnetic resonance force microscope MRFM is to place the magnetic probe on the mechanical resonator. We address the problem of spurious detector response arising from interactions between the magnetic tip and various external applied fields. We show that miniature, magnetically-polarized Nd Fe B particles show promise as 2 14 magnetic probe tips. Our experience indicates it will be important to minimize the total polarized moment of the magnetic tip and to ensure that the applied fields are as uniform as possible. q 1998 Elsevier Science B.V.