Magnetic Field Sensing by Exploiting Giant Nonstrain-Mediated Magnetodielectric Response in Epitaxial Composites

Kang, Min Gyu; Kang, Han Byul; Clavel, Michael; Maurya, Deepam; Gollapudi, Sreenivasulu; Hudait, Mantu K.; Sanghadasa, Mohan; Priya, Shashank

doi:10.1021/acs.nanolett.7b05248

Cited by 14 publications

(4 citation statements)

References 65 publications

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“…The perovskite-type manganites (generic formula A 1−x B x MnO y ) offer several different functionalities, including the colossal magneto-resistance (CMR) [1], which is interesting for various sensor elements [2][3][4][5], and large magnetic entropy changes [6,7] at the Curie temperature, T C , being interesting e.g., for thermal storage as well as for magnetic refrigeration [8,9]. For magnetic refrigeration using the magneto-caloric effect (MCE), the manganites have to compete with several types of metallic compounds, see e.g., the reviews by Gschneidner et al [8], Gottschall et al [10] and Belo et al [11].…”

Section: Introductionmentioning

confidence: 99%

Functional LSMO foams for magneto-caloric applications

Koblischka,

Koblischka-Veneva,

Schmauch

2024

Appl. Phys. A

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The ferromagnetic La$$_{1-x}$$ 1 - x Sr$$_{x}$$ x MnO$$_3$$ 3 (LSMO) manganites are ideal materials for magneto-caloric applications due to their high Curie temperature. Here, we prepare open-cell, porous LSMO foams starting from a commercial polyurethane (PU) foam and commercial LSMO powder with $$x = 0.3.$$ x = 0.3 . The cut PU foams are then covered by a slurry of LSMO powder mixed with PVA and water, and then, the foams are subjected to a heat-treatment with two steps at 600 $$^\circ$$ ∘ C (burn-off organic material) and 1200 $$^\circ$$ ∘ C (sintering/compacting). The resulting ceramic LSMO foams are then characterized by X-ray, SEM, electron backscatter diffraction (EBSD) orientation mapping and magnetic measurements. The foam sample consists of randomly-oriented LSMO grains with an average grain size of 188 nm, being distinctly smaller than bulk samples of the same composition, but considerably larger than LSMO nanowires prepared by electrospinning. The magnetic data reveal a high Curie temperature like the bulk samples, and an entropy change, $$-\Delta S_{\text{M}}$$ - Δ S M slightly higher than that of the bulk samples, which points to a strong influence of the LSMO grain size. Thus, the resulting LSMO foam material is well suited for magneto-caloric applications at room temperature.

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Section: Introductionmentioning

confidence: 99%

Functional LSMO foams for magneto-caloric applications

Koblischka,

Koblischka-Veneva,

Schmauch

2024

Appl. Phys. A

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“…In the current flexible electronics, however, only limited oxide materials are acceptable to be integrated because of their incompatible processing temperature with the flexible polymer platforms. In particular, ferroelectric oxides have evinced enormous interest since their intrinsic multifunctionality (ferroelectricity, pyroelectricity, and piezoelectricity) allows diverse operation for novel electronic devices, such as photovoltaics, − next-generation memory devices, − nonlinear photonics, − sensors, − and energy harvesting. − However, their integration on flexible polymer substrates has still been restricted because of much higher crystallization temperatures (>600 °C) relative to the maximum acceptable temperature of the polymer. Note that polyimide (PI) has the highest glass-transition temperature ( T g ) among the polymers (∼360 °C), and the polymer is usable and compatible below the T g .…”

Section: Introductionmentioning

confidence: 99%

Direct Growth of Ferroelectric Oxide Thin Films on Polymers through Laser-Induced Low-Temperature Liquid-Phase Crystallization

et al. 2020

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The outstanding multifunctionality of ferroelectric oxides has opened up new fields in microelectronics. However, the high crystallization temperature of the ferroelectric oxides limits their integration into functional platforms, such as flexible polymers. Here, the direct synthesis of the ferroelectric oxide thin films on the flexible polymer platforms is demonstrated. A new growth mechanism for the oxide thin film, named laser-activated liquid phase crystallization, has been discovered, which facilitates the ultrafast low-temperature crystallization of the ferroelectric PbZr0.52Ti0.48O3 (PZT) thin film. Through this mechanism, a homogeneous crystalline PZT thin film is obtained on a flexible polyimide substrate at 200 °C. The flexible PZT film is found to exhibit outstanding ferroelectric and piezoelectric properties along both the in-plane and out-of-plane direction. Exploiting the flexible PZT thin film, flexible ferroelectric capacitors and piezoelectric sensors are demonstrated. The findings of this study provide new functions in flexible electronics and shall pave the way for entirely new applications.

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“…[5][6][7][8][9] Search-coil, as a conventional magnetic sensor, has a high magnetic sensitivity, and its detectable magnetic field is as low as 20 fT/Hz 1/2 at 1 kHz. [16][17][18][19][20][21][22][23] Compared with magnetic sensors mentioned above, the ME sensor shows great potential for weak magnetic detection due to its superhigh magnetic field sensitivity. And the search-coil is often limited to the detection for the alternating current magnetic field.…”

Section: Introductionmentioning

confidence: 99%

A 1D Magnetoelectric Sensor Array for Magnetic Sketching

Shi

Chen

et al. 2018

Adv Materials Technologies

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sensor consisting of a ferromagnetic material surrounded by two coils, one of which is a drive and the other one is a sensing coil, is another widely used magnetic field sensor. The major advantage of the fluxgate sensor over search coils is its ability to precisely measure the weak direct current (DC) magnetic field. However, a fluxgate sensor typically consumes much more power than a search-coil sensor does; also, its sizes are normally big, limiting its applications as a magnetic sensor array for magnetic positioning and imaging. Superconducting quantum interference device is designed based on the Josephson effect, exhibiting the highest sensitivity. However, the need for a liquid-helium coolant for a superconductor magnetometers makes the complete instrument rather bulky and costly. Hall effect sensor, also viewed as a widely used and low-cost sensor, is unfortunately unable to detect a magnetic field weaker than 100 nT.Meanwhile, there are various techniques for metal detecting and metal imaging. Electromagnetic wave-based imaging technologies, such as millimeter waves imaging [3,11] and terahertz waves imaging, [2][3][4] typically employ the difference of transmissivity and reflectivity among different materials. However, this very expensive millimeter wave or terahertz wave technology cannot easily distinguish magnetic objects from nonmagnetic ones. In the case of magnetic imaging for medical application, magnetic induction tomography (MIT), magnetic particle imaging (MPI), and nuclear magnetic resonance (NMR) are typically used. [12,13] MIT technology applies the magnetic field to detect the existence of the object that is going to image. [14,15] The detection principle of the MIT system is based on the giant magneto resistance effect, which shows a high spatial resolution but a very small magnetic detection range too. For MPI and NMR technologies, a good resolution could be obtained; however, a high magnetic intensity is normally assisted. [13] In addition, the superhigh cost and the relatively big size limit the civil applications of MPI and NMR technologies. In the field of metal detection or security checking, X-ray or terahertz waves imaging technologies are normally utilized. But the problem is the body damage of the X-ray passing through a person or the privacy protection issue.Magnetoelectric (ME) effect is defined as the polarization induced by a magnetic field (H) or the magnetization induced by an electric field (E). ME sensors, which consist of ferromagnetic/ferroelectric composite materials Although various magnetic sensors have been developed, tiny magnetic object detection is still a challenging issue in some cases, such as capsule position detection, endoscope navigation, and the detection of magnetic devices hidden in/on the human body. In this paper, a magnetic detecting and sketching system utilizing a 1D magnetic sensor array with 56 magnetoelectric (ME) sensing units is proposed. The ME sensors used in this system are based on a (1-1) connectivity Metglas/piezofiber composite operatin...

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Magnetic Field Sensing by Exploiting Giant Nonstrain-Mediated Magnetodielectric Response in Epitaxial Composites

Cited by 14 publications

References 65 publications

Functional LSMO foams for magneto-caloric applications

Functional LSMO foams for magneto-caloric applications

Direct Growth of Ferroelectric Oxide Thin Films on Polymers through Laser-Induced Low-Temperature Liquid-Phase Crystallization

A 1D Magnetoelectric Sensor Array for Magnetic Sketching

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