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Sachser R, Hütner J, Schwalb CH, Huth M. Granular Hall Sensors for Scanning Probe Microscopy. NANOMATERIALS 2021; 11:nano11020348. [PMID: 33535393 PMCID: PMC7912574 DOI: 10.3390/nano11020348] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 01/21/2021] [Accepted: 01/25/2021] [Indexed: 02/01/2023]
Abstract
Scanning Hall probe microscopy is attractive for minimally invasive characterization of magnetic thin films and nanostructures by measurement of the emanating magnetic stray field. Established sensor probes operating at room temperature employ highly miniaturized spin-valve elements or semimetals, such as Bi. As the sensor layer structures are fabricated by patterning of planar thin films, their adaption to custom-made sensor probe geometries is highly challenging or impossible. Here we show how nanogranular ferromagnetic Hall devices fabricated by the direct-write method of focused electron beam induced deposition (FEBID) can be tailor-made for any given probe geometry. Furthermore, we demonstrate how the magnetic stray field sensitivity can be optimized in situ directly after direct-write nanofabrication of the sensor element. First proof-of-principle results on the use of this novel scanning Hall sensor are shown.
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Affiliation(s)
- Roland Sachser
- Institute of Physics, Goethe University, Max-von-Laue-Str. 1, 60438 Frankfurt am Main, Germany;
| | - Johanna Hütner
- GETec Microscopy GmbH, Am Heumarkt 13, 1030 Wien, Austria;
| | | | - Michael Huth
- Institute of Physics, Goethe University, Max-von-Laue-Str. 1, 60438 Frankfurt am Main, Germany;
- Correspondence:
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Shaw G, Kramer RBG, Dempsey NM, Hasselbach K. A scanning Hall probe microscope for high resolution, large area, variable height magnetic field imaging. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2016; 87:113702. [PMID: 27910624 DOI: 10.1063/1.4967235] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We present a scanning Hall probe microscope operating in ambient conditions. One of the unique features of this microscope is the use of the same stepper motors for both sample positioning as well as scanning, which makes it possible to have a large scan range (few mm) in the x and y directions, with a scan resolution of 0.1 μm. Protocols have been implemented to enable scanning at different heights from the sample surface. The z range is 35 mm. Microstructured Hall probes of size 1-5 μm have been developed. A minimum probe-sample distance <2 μm has been obtained by the combination of new Hall probes and probe-sample distance regulation using a tuning fork based force detection technique. The system is also capable of recording local B(z) profiles. We discuss the application of the microscope for the study of micro-magnet arrays being developed for applications in micro-systems.
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Affiliation(s)
- Gorky Shaw
- Université Grenoble Alpes, Institut Néel, F-38042 Grenoble, France
| | - R B G Kramer
- Université Grenoble Alpes, Institut Néel, F-38042 Grenoble, France
| | - N M Dempsey
- Université Grenoble Alpes, Institut Néel, F-38042 Grenoble, France
| | - K Hasselbach
- Université Grenoble Alpes, Institut Néel, F-38042 Grenoble, France
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Melzer M, Mönch JI, Makarov D, Zabila Y, Cañón Bermúdez GS, Karnaushenko D, Baunack S, Bahr F, Yan C, Kaltenbrunner M, Schmidt OG. Wearable magnetic field sensors for flexible electronics. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:1274-80. [PMID: 25523752 PMCID: PMC4338756 DOI: 10.1002/adma.201405027] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Revised: 11/20/2014] [Indexed: 05/18/2023]
Abstract
Highly flexible bismuth Hall sensors on polymeric foils are fabricated, and the key optimization steps that are required to boost their sensitivity to the bulk value are identified. The sensor can be bent around the wrist or positioned on the finger to realize an interactive pointing device for wearable electronics. Furthermore, this technology is of great interest for the rapidly developing market of -eMobility, for optimization of eMotors and magnetic bearings.
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Affiliation(s)
- Michael Melzer
- Institute for Integrative Nanosciences, Institute for Solid State and Materials Research Dresden (IFW Dresden)01069, Dresden, Germany E-mail:
| | - Jens Ingolf Mönch
- Institute for Integrative Nanosciences, Institute for Solid State and Materials Research Dresden (IFW Dresden)01069, Dresden, Germany E-mail:
| | - Denys Makarov
- Institute for Integrative Nanosciences, Institute for Solid State and Materials Research Dresden (IFW Dresden)01069, Dresden, Germany E-mail:
| | - Yevhen Zabila
- The H. Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences31–342, Krakow, Poland
| | - Gilbert Santiago Cañón Bermúdez
- Institute for Integrative Nanosciences, Institute for Solid State and Materials Research Dresden (IFW Dresden)01069, Dresden, Germany E-mail:
| | - Daniil Karnaushenko
- Institute for Integrative Nanosciences, Institute for Solid State and Materials Research Dresden (IFW Dresden)01069, Dresden, Germany E-mail:
| | - Stefan Baunack
- Institute for Integrative Nanosciences, Institute for Solid State and Materials Research Dresden (IFW Dresden)01069, Dresden, Germany E-mail:
| | - Falk Bahr
- Elektrotechnisches Institut, Technische Universität Dresden01069, Dresden, Germany
| | - Chenglin Yan
- Institute for Integrative Nanosciences, Institute for Solid State and Materials Research Dresden (IFW Dresden)01069, Dresden, Germany E-mail:
- College of Physics, Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University215006, Suzhou, China
| | - Martin Kaltenbrunner
- Department of Soft Matter Physics, Johannes Kepler UniversityAltenbergerstrasse 69, 4040, Linz, Austria
| | - Oliver G Schmidt
- Institute for Integrative Nanosciences, Institute for Solid State and Materials Research Dresden (IFW Dresden)01069, Dresden, Germany E-mail:
- Material Systems for Nanoelectronics, Chemnitz University of Technology09107, Chemnitz, Germany
- Center for Advancing Electronics Dresden, Dresden University of Technology01062, Dresden, Germany
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