Focused particle beam-induced processing

Huth, Michael

doi:10.3762/bjnano.6.191

Cited by 6 publications

(6 citation statements)

References 17 publications

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“…Thus, the transition to isotropic vortex dynamics is steeper in T the smaller the pinning barrier is. However, although the general formulas ( 29), (32), and (34) for the experimentally accessible quantities include the angle and temperature dependences, for the presentation of the data we used α = 0 • and g ≡ U p /2T = 100 for the sake of simplicity.…”

Section: Discussionmentioning

confidence: 99%

“…To summarize, the experimentally accessible values, namely the dc voltage, the contribution of the kω-harmonics in the ac response, and the absorbed ac power, are determined by equations ( 29), (32), and (34), respectively. Their behavior as functions of all driving parameters in the problem is analyzed next.…”

Section: Expressions For Experimentally Accessible Valuesmentioning

confidence: 99%

“…Among state-of-the-art nanofabrication methods suitable for an accurate realization of the WPP used in this work (see below equation ( 2)), two advanced mask-less techniques should be mentioned. First, direct nano-writing by focused ion beam milling [31,32] allows one to fabricate nanogroove arrays [33], inducing a WPP in a processed film by vortex length reduction and order parameter suppression. Second, a complementary nanofabrication tool, focused electron beam-induced deposition [34] of the metal-organic precursor Co 2 (CO) 8 , can be used for furnishing the surface of a superconducting film with an array of ferromagnetic Co strips [35,36] such that a WPP is provided that influences the vortex motion.…”

Section: Introductionmentioning

confidence: 99%

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Vortex ratchet reversal in an asymmetric washboard pinning potential subject to combined dc and ac stimuli

Shklovskij¹,

Sosedkin²,

Dobrovolskiy³

2013

J. Phys.: Condens. Matter

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The mixed-state resistive response of a superconductor thin film with an asymmetric washboard pinning potential subject to superimposed dc and ac currents of arbitrary amplitudes and frequency at finite temperature is theoretically investigated. The problem is considered in the single-vortex approximation, relying upon the exact solution of the Langevin equation in terms of a matrix continued fraction. The dc voltage response and the absorbed power in ac response are analyzed as functions of dc bias and ac current amplitude and frequency in a wide range of corresponding dimensionless parameters. Predictions are made of (i) a reversal of the rectified voltage at small dc biases and strong ac drives and (ii) a non-monotonic enhancement of the absorbed power in the nonlinear ac response at far sub-depinning frequencies. It is elucidated how and why both these effects appear due to the competition of the fixed internal and the tunable, dc bias-induced external asymmetry of the potential as the only reason. This is distinct from other scenarios used for explaining the vortex ratchet reversal effect so far.

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Section: Discussionmentioning

confidence: 99%

Section: Expressions For Experimentally Accessible Valuesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Vortex ratchet reversal in an asymmetric washboard pinning potential subject to combined dc and ac stimuli

Shklovskij¹,

Sosedkin²,

Dobrovolskiy³

2013

J. Phys.: Condens. Matter

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“…Nanoscale fabrication is the central theme of modern technology, and electron beam methodologies are said to be one of the most versatile techniques. , In this context, focused electron beam induced deposition (FEBID) is a promising technique for a direct three-dimensional (3D) deposition of high-purity materials. − The precursor material is deposited on a surface and is concomitantly decomposed under a focused beam of electrons in the energy range of kiloelectronvolts. During the FEBID process, both the primary particles and the secondary species, that is, ballistic low-energy (<50 eV) electrons, , act for the surface modification.…”

Section: Introductionmentioning

confidence: 99%

Interaction of Slow Electrons with Thermally Evaporated Manganese(II) Acetylacetonate Complexes

2020

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Complexes of metal acetylacetonate are used as general precursors for the synthesis of metal oxide nanomaterials. In the present work, we study the interaction of low-energy (<10 eV) electrons, produced abundantly as secondary electrons during the bombardment of the substrate by the primary particles, with thermally evaporated manganese(II) acetylacetonate complexes. We found that the acetylacetonate anion ([acac]−) is the major anionic species produced, while the second most abundant is the parent anion [Mn(II)(acac)2]−. This observation differs from those reported from electron attachment to Cu(acac)2, for which [Cu(II)(acac)2]− is the predominant anion [Phys. Chem. Chem. Phys.2018207746]. The experimental data are supported by theory to provide information on the physical-chemistry processes initiated by slow electrons to the organometallic precursor and to interpret the different behavior of Mn(acac)2 compared to Cu(acac)2.

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“…Focused particle beam processing is a novel technique, which is rapidly developing in the field of nanofabrication. − A straightforward use of electron and ion beams for nanopatterning led to extensive studies of electron and ion beam interactions with substrate materials, which are now fairly well understood . The situation is different for beam-assisted deposition techniques where precursor molecules (often metal-containing) are introduced to the vicinity of a substrate by a gas-injection system.…”

Section: Introductionmentioning

confidence: 99%

Decomposition of Iron Pentacarbonyl Induced by Singly and Multiply Charged Ions and Implications for Focused Ion Beam-Induced Deposition

et al. 2019

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Focused ion beams are becoming important tools in nanofabrication. The underlying physical processes in the substrate were already explored for several projectile ions. However, studies of ion interaction with precursor molecules for beam-assisted deposition are almost nonexistent. Here, we explore the interaction of various projectile ions with iron pentacarbonyl. We report fragmentation patterns of isolated gas-phase iron pentacarbonyl after interaction with 4He+ at a collision energy of 16 keV, 4He2+ at 16 keV, 20Ne+ at 6 keV, 20Ne4+ at 40 keV, 40Ar+ at 3 keV, 40Ar3+ at 21 keV, 84Kr3+ at 12 keV, and 84Kr17+ at 255 keV. These projectiles cover interaction regimes ranging from collisions dominated by nuclear stopping through collisions dominated by electronic stopping to soft resonant electron-capture interactions. We report a surprising efficiency of Ne+ in the Fe(CO)5 decomposition. The interaction with multiply charged ions results in a higher content of parent ions and slow metastable fragmentation due to the electron-capture process. The release of CO groups during the decomposition process seems to take off a significant amount of energy. The fragmentation mechanism may be described as Fe being trapped within a CO cluster.

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Focused particle beam-induced processing

Cited by 6 publications

References 17 publications

Vortex ratchet reversal in an asymmetric washboard pinning potential subject to combined dc and ac stimuli

Vortex ratchet reversal in an asymmetric washboard pinning potential subject to combined dc and ac stimuli

Interaction of Slow Electrons with Thermally Evaporated Manganese(II) Acetylacetonate Complexes

Decomposition of Iron Pentacarbonyl Induced by Singly and Multiply Charged Ions and Implications for Focused Ion Beam-Induced Deposition

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