Magnetic force microscopy sensors using iron-filled carbon nanotubes

Winkler, Andreas; Mühl, Thomas; Menzel, S.; Kozhuharova‐Koseva, R.; Hampel, Silke; Leonhardt, A.; Büchner, B.

doi:10.1063/1.2195879

Cited by 118 publications

(71 citation statements)

References 25 publications

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“…In order to improve the spatial resolution of the MFM technique, a further development of the magnetic probes is required. To achieve this goal, several approaches are described in the literature (Martin and Wickramasinghe, 1987;Göddenhenrich et al ., 1988Göddenhenrich et al ., , 1990Akama et al ., 1990;Rugar et al ., 1990;Vasile et al ., 1991;Grütter et al ., 1992;Wadas et al ., 1994;Moser et al ., 1995;Dai et al ., 1996;Jumpertz et al ., 1997;Hartmann, 1999;Wickramasinghe, 2000;Deng et al ., 2004;Winkler et al ., 2006) including three techniques that fulfil best the requirements of miniaturization: electron beam deposition (EBD) (Akama et al ., 1990;Jumpertz et al ., 1997), FIB milling (Vasile et al ., 1991) and attaching fullerene carbon multiwalled nanotubes (MWNTs) (Dai et al ., 1996) filled with magnetic material (Winkler et al ., 2006) or magnetically coated ones (Deng et al ., 2004) attached to microfabricated Si cantilever tips. The EBD and FIB approaches and the attached MWNTs proved to be the most successful ones, as the smallest sizes could be achieved: possible tip shanks could be as small as 5 nm in diameter.…”

Section: Introductionmentioning

confidence: 94%

Advanced Cantilevers for Magnetic Force Microscopy and High Frequency Magnetic Force Microscopy

et al. 2008

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In order to improve the spatial resolution achieved by magnetic force microscopy (MFM) technique and its derivatives, we employ here advanced MFM tips fabricated by means of focused ion beam (FIB) milling. The magnetic coating applied on these tips is a CoCr film of 10 nm thickness. The MFM measurements on hard disk test samples reveal the achieved high resolution, and the measurement on a garnet film demonstrates the low invasiveness. High-frequency MFM (HF-MFM) is a development of the MFM technique to observe the HF stray fields emerging from magnetic recording writer poles at their operating conditions. By means of HF-MFM, magnetic recording writer poles are characterized in the frequency range 100-1,000 MHz. Up to now, all HF-MFM experiments conducted were using standard MFM cantilevers. From the HF-MFM images obtained using the advanced MFM cantilevers, it is clearly seen that the spatial resolution is considerably improved over the images obtained using standard MFM tips. However, the 10 nm thick magnetic coating of the cantilevers is found to work properly only at frequencies of up to about 500 MHz.

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Section: Introductionmentioning

confidence: 94%

Advanced Cantilevers for Magnetic Force Microscopy and High Frequency Magnetic Force Microscopy

et al. 2008

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“…33 Also, aggregation of NWs has to be prevented in order to obtain high-quality homogeneous ferrofluids or to preserve the mechanical properties of composites containing magnetic NWs. 13 Magnetic dipolar interactions between magnetic particles dispersed in liquids are directly responsible for their agglomeration. In the absence of a magnetic field, such interactions are proportional to the overall remanent magnetization of each particle.…”

Section: Or Inmentioning

confidence: 99%

Tailoring Staircase-like Hysteresis Loops in Electrodeposited Trisegmented Magnetic Nanowires: a Strategy toward Minimization of Interwire Interactions

Zhang

Agramunt-Puig

Del-Valle

et al. 2016

ACS Appl. Mater. Interfaces

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“…Many unique applications can be envisioned using these functional materials [60][61][62][63][64]. One example is the fabrication of nanothermometers consisting of liquid Ga filled CNTs, wherein our group showed that the liquid Ga column inside the CNT expands and compresses reversibly within a wide temperature range of about 500…”

Section: Properties and Prospects Of Filled Cntsmentioning

confidence: 99%

Recent developments in inorganically filled carbon nanotubes: successes and challenges

Gautam

Costa²,

Bando

et al. 2010

Science and Technology of Advanced Materials

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Carbon nanotubes (CNTs) are a unique class of nanomaterials that can be imagined as rolled graphene sheets. The inner hollow of a CNT provides an extremely small, one-dimensional space for storage of materials. In the last decade, enormous effort has been spent to produce filled CNTs that combine the properties of both the host CNT and the guest filling material. CNTs filled with various inorganic materials such as metals, alloys, semiconductors and insulators have been obtained using different synthesis approaches including capillary filling and chemical vapor deposition. Recently, several potential applications have emerged for these materials, such as the measurement of temperature at the nanoscale, nano-spot welding, and the storage and delivery of extremely small quantities of materials. A clear distinction between this class of materials and other nanostructures is the existence of an enormous interfacial area between the CNT and the filling matter. Theoretical investigations have shown that the lattice mismatch and strong exchange interaction of CNTs with the guest material across the interface should result in reordering of the guest crystal structure and passivation of the surface dangling bonds and thus yielding new and interesting physical properties. Despite preliminary successes, there remain many challenges in realizing applications of CNTs filled with inorganic materials, such as a comprehensive understanding of their growth and physical properties and control of their structural parameters. In this article, we overview research on filled CNT nanomaterials with special emphasis on recent progress and key achievements. We also discuss the future scope and the key challenges emerging out of a decade of intensive research on these fascinating materials.

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Magnetic force microscopy sensors using iron-filled carbon nanotubes

Cited by 118 publications

References 25 publications

Advanced Cantilevers for Magnetic Force Microscopy and High Frequency Magnetic Force Microscopy

Advanced Cantilevers for Magnetic Force Microscopy and High Frequency Magnetic Force Microscopy

Tailoring Staircase-like Hysteresis Loops in Electrodeposited Trisegmented Magnetic Nanowires: a Strategy toward Minimization of Interwire Interactions

Recent developments in inorganically filled carbon nanotubes: successes and challenges

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