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Valerio Apicella
Department of Engineering – University of Sannio, 82100 Benevento, Italy

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Journal article
Published: 03 February 2020 in Mathematics and Computers in Simulation
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The paper deals with an engineering application of the inverse magnetostrictive Villari effect. This effect is usually modeled through multi-variate relationships, strongly non linear and with hysteresis. Here, the task is to provide a suitable formulation of those relationships aiming at a device able to measure mechanical force profiles with good accuracy. The device is analyzed and modeled by a mapping function, resulting in an algorithm that reconstructs the time profile of the applied force. A preliminary calibration characterization is carried out on a concept device that exploits Galfenol as magnetostrictive material. Finally, some tests performed with the aim of validating the algorithm and to estimate its performance are presented.

ACS Style

Valerio Apicella; Carmine Stefano Clemente; Daniele Davino; Damiano Leone; Ciro Visone. Analysis and Modeling of a passive force sensor based on Villari effect. Mathematics and Computers in Simulation 2020, 183, 234 -243.

AMA Style

Valerio Apicella, Carmine Stefano Clemente, Daniele Davino, Damiano Leone, Ciro Visone. Analysis and Modeling of a passive force sensor based on Villari effect. Mathematics and Computers in Simulation. 2020; 183 ():234-243.

Chicago/Turabian Style

Valerio Apicella; Carmine Stefano Clemente; Daniele Davino; Damiano Leone; Ciro Visone. 2020. "Analysis and Modeling of a passive force sensor based on Villari effect." Mathematics and Computers in Simulation 183, no. : 234-243.

Journal article
Published: 30 August 2019 in IEEE Magnetics Letters
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Low-temperature magnetic sensors are based on Hall effect in thin metallic films. Their sensitivity is more than one order of magnitude smaller than silicon-based Hall sensors operating at room-temperature, because so is the Hall effect in metals. Besides, in order to avoid significant Joule heating, only very small bias currents can be injected. Here we show that a sensor based on photo-induced Hall effect, in which charge is photo-generated in a semiconductor and injected into an adjacent metallic layer, can be used as a bias-free, cryogenic sensor. The system consists of a platinum thin-film deposited on intrinsic-silicon substrate. The film forms a Schottky interface with the semiconductor. At room temperature, carriers photo-generated in the semiconductor are injected into the metal because of rounding-off of the Schottky barrier and deflected by a magnetic field applied in the film-plane. At cryogenic temperature and well-below the freeze-out temperature for silicon, the photo-generated electrons can tunnel through the barrier and the sensor recovers the same sensitivity as that observed at room temperature.

ACS Style

Teslim Ayinde Fasasi; Valerio Apicella; Dong Li; Antonio Ruotolo. Photoinduced Hall Effect for Low-Temperature Magnetic Sensing. IEEE Magnetics Letters 2019, 10, 1 -4.

AMA Style

Teslim Ayinde Fasasi, Valerio Apicella, Dong Li, Antonio Ruotolo. Photoinduced Hall Effect for Low-Temperature Magnetic Sensing. IEEE Magnetics Letters. 2019; 10 (99):1-4.

Chicago/Turabian Style

Teslim Ayinde Fasasi; Valerio Apicella; Dong Li; Antonio Ruotolo. 2019. "Photoinduced Hall Effect for Low-Temperature Magnetic Sensing." IEEE Magnetics Letters 10, no. 99: 1-4.

Journal article
Published: 06 August 2019 in Advanced Electronic Materials
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ACS Style

Valerio Apicella; Teslim Ayinde Fasasi; Shu Wang; Sipeng Lei; Antonio Ruotolo. A Multilayer‐Graphene/Silicon Infrared Schottky Photo‐Diode. Advanced Electronic Materials 2019, 5, 1 .

AMA Style

Valerio Apicella, Teslim Ayinde Fasasi, Shu Wang, Sipeng Lei, Antonio Ruotolo. A Multilayer‐Graphene/Silicon Infrared Schottky Photo‐Diode. Advanced Electronic Materials. 2019; 5 (12):1.

Chicago/Turabian Style

Valerio Apicella; Teslim Ayinde Fasasi; Shu Wang; Sipeng Lei; Antonio Ruotolo. 2019. "A Multilayer‐Graphene/Silicon Infrared Schottky Photo‐Diode." Advanced Electronic Materials 5, no. 12: 1.

Review
Published: 29 May 2019 in Actuators
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Magnetostrictive actuators play an important role in the perception of usefulness of smart materials and devices. Their applications are potentially wider than that of piezoelectric actuators because of the higher energy density and intrinsic robustness. However, the non-negligible hysteresis and complexity of their characteristics make the design and control quite difficult and has limited their diffusion in industrial applications. Nevertheless, the scientific literature presents a wide offer of results in design and geometries, modeling and control that may be exploited for applications. This paper gives a reasoned review of the main results achieved in the literature about design, modeling and control of magnetostrictive actuators exploiting the direct effects of magnetostriction (Joule and Wiedemann). Some perspectives and challenges about magnetostrictive actuators development are also gathered.

ACS Style

Valerio Apicella; Carmine Stefano Clemente; Daniele Davino; Damiano Leone; Ciro Visone. Review of Modeling and Control of Magnetostrictive Actuators. Actuators 2019, 8, 45 .

AMA Style

Valerio Apicella, Carmine Stefano Clemente, Daniele Davino, Damiano Leone, Ciro Visone. Review of Modeling and Control of Magnetostrictive Actuators. Actuators. 2019; 8 (2):45.

Chicago/Turabian Style

Valerio Apicella; Carmine Stefano Clemente; Daniele Davino; Damiano Leone; Ciro Visone. 2019. "Review of Modeling and Control of Magnetostrictive Actuators." Actuators 8, no. 2: 45.

Journal article
Published: 13 November 2018 in Journal of Magnetism and Magnetic Materials
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The analysis of a magnetostrictive cantilever for energy harvesting purposes is addressed. The focus of the work is on outlining, by a thorough experimental study, the basic phenomena affecting the behavior of such systems and, in particular, how the geometry of the physical structure can affect the overall performance of the harvester. Several harvester prototypes have been realized by bonding together one or more magnetostrictive laminations to Al sheets. Further, the influence of the magnetic bias is investigated by exploiting permanent magnets in different positions of the cantilever. The results are discussed in detail and a converted power up to 40mW is observed at 4g impressed acceleration of the sample.

ACS Style

Valerio Apicella; Carmine Stefano Clemente; Daniele Davino; Damiano Leone; Ciro Visone. Magneto-mechanical optimization and analysis of a magnetostrictive cantilever beam for energy harvesting. Journal of Magnetism and Magnetic Materials 2018, 475, 401 -407.

AMA Style

Valerio Apicella, Carmine Stefano Clemente, Daniele Davino, Damiano Leone, Ciro Visone. Magneto-mechanical optimization and analysis of a magnetostrictive cantilever beam for energy harvesting. Journal of Magnetism and Magnetic Materials. 2018; 475 ():401-407.

Chicago/Turabian Style

Valerio Apicella; Carmine Stefano Clemente; Daniele Davino; Damiano Leone; Ciro Visone. 2018. "Magneto-mechanical optimization and analysis of a magnetostrictive cantilever beam for energy harvesting." Journal of Magnetism and Magnetic Materials 475, no. : 401-407.

Journal article
Published: 01 November 2018 in Physica B: Condensed Matter
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ACS Style

Valerio Apicella; Carmine Stefano Clemente; Daniele Davino; Ciro Visone. Experimental evaluation of external and built-in stress in Galfenol rods. Physica B: Condensed Matter 2018, 549, 53 -57.

AMA Style

Valerio Apicella, Carmine Stefano Clemente, Daniele Davino, Ciro Visone. Experimental evaluation of external and built-in stress in Galfenol rods. Physica B: Condensed Matter. 2018; 549 ():53-57.

Chicago/Turabian Style

Valerio Apicella; Carmine Stefano Clemente; Daniele Davino; Ciro Visone. 2018. "Experimental evaluation of external and built-in stress in Galfenol rods." Physica B: Condensed Matter 549, no. : 53-57.

Journal article
Published: 15 October 2018 in IEEE Transactions on Magnetics
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Magnetostrictive actuators show interesting performances related to high-precision actuation with high-energy density, which focused the interest of research in the past years. Nevertheless, the output deformation is related to the current and the applied stress, through a complex multi-input multi-output (MIMO) hysteresis process. As a consequence, a reliable and accurate control task cannot neglect the stress monitoring. Such task, if performed by an ad hoc stress sensor, e.g., a load cell, will face with the sensor's placement in the device, resulting in an increase in cost, complexity, and bulkiness of the system. This issue can be circumvent if the current and magnetic flux measurements, available in the control chain, are exploited. To this aim, a novel self-sensing approach to deliver real-time estimation of the stress is presented in this paper, involving some recent results of a thermodynamic compatible MIMO model of hysteresis for magnetostrictive materials.

ACS Style

Valerio Apicella; Carmine Stefano Clemente; Daniele Davino; Damiano Leone; Ciro Visone. Self-Sensing Estimation of Mechanical Stress in Magnetostrictive Actuators. IEEE Transactions on Magnetics 2018, 55, 1 -5.

AMA Style

Valerio Apicella, Carmine Stefano Clemente, Daniele Davino, Damiano Leone, Ciro Visone. Self-Sensing Estimation of Mechanical Stress in Magnetostrictive Actuators. IEEE Transactions on Magnetics. 2018; 55 (1):1-5.

Chicago/Turabian Style

Valerio Apicella; Carmine Stefano Clemente; Daniele Davino; Damiano Leone; Ciro Visone. 2018. "Self-Sensing Estimation of Mechanical Stress in Magnetostrictive Actuators." IEEE Transactions on Magnetics 55, no. 1: 1-5.

Journal article
Published: 15 August 2018 in Sensors and Actuators A: Physical
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A magnetic field sensor prototype is developed and tested in this work. The device exploits a Galfenol rod, i.e. a giant magnetostrictive Iron-Gallium alloy, integrated with a Fiber Bragg Grating. In particular, the full-scale range of the sensor can be modulated through the exploitation of the geometrically dependent effect of the demagnetizing field. Indeed, it pushes toward higher fields the magnetic saturation by producing a sort of magnetic shield in the material. As a consequence, the geometrical viewpoint is included into the frame of the entire design process, with the aim of investigate how it influences the detectability range and the performance of the sensor. Furthermore, a permanent magnet system providing a DC bias magnetic field has been designed and exploited to allow the device to be able to measure both negative and positive magnetic fields.

ACS Style

V. Apicella; M.A. Caponero; D. Davino; C. Visone. A magnetostrictive biased magnetic field sensor with geometrically controlled full-scale range. Sensors and Actuators A: Physical 2018, 280, 475 -483.

AMA Style

V. Apicella, M.A. Caponero, D. Davino, C. Visone. A magnetostrictive biased magnetic field sensor with geometrically controlled full-scale range. Sensors and Actuators A: Physical. 2018; 280 ():475-483.

Chicago/Turabian Style

V. Apicella; M.A. Caponero; D. Davino; C. Visone. 2018. "A magnetostrictive biased magnetic field sensor with geometrically controlled full-scale range." Sensors and Actuators A: Physical 280, no. : 475-483.

Journal article
Published: 18 May 2017 in IEEE Transactions on Magnetics
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This paper investigates new developments of a class of magnetic field sensors based on the integration of Iron-Gallium magnetostrictive alloys (Galfenol) and Fiber Bragg Gratings (FBGs) used to detect the magneto-induced mechanical strain. This kind of sensor has the advantage of being able to work also in harsh environments, but on the other hand can not detect fields beyond $10k$ A/m, because of the magnetic softness of the active material. A simple solution consists in the exploitation of the demagnetizing field experienced by the ferromagnetic alloy by effect of its magnetization, generated by the application of the external magnetic field. Since the demagnetizing field effect depends only on geometrical parameters, the use of samples with different aspect ratios allows us to check how the shape of the active material can be used as a control parameter of the sensor detection range.

ACS Style

Valerio Apicella; Michele Arturo Caponero; Cesidio Cianfarani; Daniele Davino; Andrea Polimadei; Ciro Visone. Demagnetizing Field Effect on the Detection Range of a Galfenol-Based Magnetic Field Sensor. IEEE Transactions on Magnetics 2017, 53, 1 -5.

AMA Style

Valerio Apicella, Michele Arturo Caponero, Cesidio Cianfarani, Daniele Davino, Andrea Polimadei, Ciro Visone. Demagnetizing Field Effect on the Detection Range of a Galfenol-Based Magnetic Field Sensor. IEEE Transactions on Magnetics. 2017; 53 (11):1-5.

Chicago/Turabian Style

Valerio Apicella; Michele Arturo Caponero; Cesidio Cianfarani; Daniele Davino; Andrea Polimadei; Ciro Visone. 2017. "Demagnetizing Field Effect on the Detection Range of a Galfenol-Based Magnetic Field Sensor." IEEE Transactions on Magnetics 53, no. 11: 1-5.

Journal article
Published: 01 October 2016 in Advances in Science and Technology
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The paper aims to discuss the basic issues related to the analysis and design of magnetic sensors based on the employment of magneto-active materials. In particular, the basic idea is based on the integration of a Galfenol magnetostrictive alloy to a Fiber Bragg Grating (FBG) embedded into an optic fiber, able to sense the deformation of the material induced by magnetic field. The structure of the alloy and the characteristics of the fiber, make the device suitable to work also in harsh envi- ronments. One of the basic goals is to provide a sensor as simple as possible, with high field range detection and, at the same time, low reconstruction error. It has been observed that the increase of the field range could be achieved by exploiting the effects of the demagnetizing field, without exploit- ing the well-known magnetic hardening induced by the applied stress. In fact, the latter requires a clamping system, resulting in the increase of the sensor size. The demagnetizing field, conversely, provides a shielding of the external field, turning away the undesired approach to saturation. Finally, the employment of a material characterized by weak hysteresis phenomena avoids the use of complex compensation algorithm without losing accuracy. Some result of its characteristics and performances are provided.

ACS Style

Valerio Apicella; Michele Arturo Caponero; Cesidio Cianfarani; Daniele Davino; Andrea Polimadei; Ciro Visone. FBG-Galfenol Integrated Magnetic Field Sensors for Harsh Environments. Advances in Science and Technology 2016, 101, 9 -14.

AMA Style

Valerio Apicella, Michele Arturo Caponero, Cesidio Cianfarani, Daniele Davino, Andrea Polimadei, Ciro Visone. FBG-Galfenol Integrated Magnetic Field Sensors for Harsh Environments. Advances in Science and Technology. 2016; 101 ():9-14.

Chicago/Turabian Style

Valerio Apicella; Michele Arturo Caponero; Cesidio Cianfarani; Daniele Davino; Andrea Polimadei; Ciro Visone. 2016. "FBG-Galfenol Integrated Magnetic Field Sensors for Harsh Environments." Advances in Science and Technology 101, no. : 9-14.