Ultrahigh Coercivity Magnetic Force Microscopy Probes to Analyze High-Moment Magnetic Structures and Devices

Amos, Nissim; Fernandez, Robert; Ikkawi, R.; Shachar, Meir H.; Hong, Jeongmin; Lee, Beomseop; Litvinov, D.; Khizroev, Sakhrat

doi:10.1109/lmag.2010.2050679

Cited by 6 publications

(3 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, because of the diamond tip's well-defined material composition and extremely sharp end radius (<10 nm), quantitative and high-resolution field maps of the pole can be reconstructed. Our method thus provides advantages over magnetic force microscopy (MFM) 13 14 15 16 17 and electron holography 18 , which are difficult to quantify, barely reach sufficient resolution, or provide two-dimensional projections.…”

mentioning

confidence: 99%

Ultrasensitive mechanical detection of magnetic moment using a commercial disk drive write head

Tao¹,

Eichler²,

Holzherr³

et al. 2016

Nat Commun

View full text Add to dashboard Cite

Sensitive detection of weak magnetic moments is an essential capability in many areas of nanoscale science and technology, including nanomagnetism, quantum readout of spins and nanoscale magnetic resonance imaging. Here we show that the write head of a commercial hard drive may enable significant advances in nanoscale spin detection. By approaching a sharp diamond tip to within 5 nm from a write pole and measuring the induced diamagnetic moment with a nanomechanical force transducer, we demonstrate a spin sensitivity of 0.032 μB Hz−1/2, equivalent to 21 proton magnetic moments. The high sensitivity is enabled in part by the pole's strong magnetic gradient of up to 28 × 106 T m−1 and in part by the absence of non-contact friction due to the extremely flat writer surface. In addition, we demonstrate quantitative imaging of the pole field with ∼10 nm spatial resolution. We foresee diverse applications for write heads in experimental condensed matter physics, especially in spintronics, ultrafast spin manipulation and mesoscopic physics.

show abstract

mentioning

confidence: 99%

Ultrasensitive mechanical detection of magnetic moment using a commercial disk drive write head

Tao¹,

Eichler²,

Holzherr³

et al. 2016

Nat Commun

View full text Add to dashboard Cite

show abstract

“…The ideal hard magnetic single-domain tip should be an elongated needle, which has the highest shape anisotropy [2] made out of rare-earth alloy with hard magnetic phase. State-of-the-art technologies for nanomagnet fabrication are FIB [3][4][5][6][7], STM, electrodeposition and chemical vapor deposition (CVD), among others [8][9][10][11][12][13][14][15][16]. However, most of fabricated nanomagnets are made of soft, low aspect ratio thin-film materials.…”

Section: Introductionmentioning

confidence: 99%

Nanomagnets with high shape anisotropy and strong crystalline anisotropy: perspectives on magnetic force microscopy

et al. 2011

View full text Add to dashboard Cite

We report on a new approach for magnetic imaging, highly sensitive even in the presence of external, strong magnetic fields. Based on FIB-assisted fabricated high-aspect-ratio rare-earth nanomagnets, we produce groundbreaking magnetic force tips with hard magnetic character where we combine a high aspect ratio (shape anisotropy) together with strong crystalline anisotropy (rare-earth-based alloys). Rare-earth hard nanomagnets are then FIB-integrated to silicon microcantilevers as highly sharpened tips for high-field magnetic imaging applications. Force resolution and domain reversing and recovery capabilities are at least one order of magnitude better than for conventional magnetic tips. This work opens new, pioneering research fields on the surface magnetization process of nanostructures based either on relatively hard magnetic materials-used in magnetic storage media-or on materials like superparamagnetic particles, ferro/antiferromagnetic structures or paramagnetic materials.

show abstract

“…In 2010, Amos et al slightly enhanced the coercivity of FePt films deposited on Si probes, to between 1.1 and 1.2 T, by using CrRu and MgO seed layers (CrRu/MgO/FePt) and by optimizing the deposition conditions (temperature and pressure). [10] They also demonstrated the interest for these probes by imaging perpendicular magnetic recording write head under various excitation conditions. In 2018, Neu et al used the focus ion beam method to cut triangle-shaped tips out of epitaxial SmCo5 films with a coercivity of 2.5 T, and then attached them to force cantilevers with the aid of a nanomanipulation tool, for MFM imaging.…”

mentioning

confidence: 98%

SmCo-based MFM probes with high switching fields

Akdoğan

2021

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

Ultrahigh Coercivity Magnetic Force Microscopy Probes to Analyze High-Moment Magnetic Structures and Devices

Cited by 6 publications

References 19 publications

Ultrasensitive mechanical detection of magnetic moment using a commercial disk drive write head

Ultrasensitive mechanical detection of magnetic moment using a commercial disk drive write head

Nanomagnets with high shape anisotropy and strong crystalline anisotropy: perspectives on magnetic force microscopy

SmCo-based MFM probes with high switching fields

Contact Info

Product

Resources

About