Article
Materials Science, Multidisciplinary
Ricci Erlandsen, Rasmus Bjork, Lior Kornblum, Nini Pryds, Dennis V. Christensen
Summary: Researchers have achieved high-sensitivity detection of weak magnetic fields by breaking the symmetry of devices, and found that these asymmetric structures also have other excellent magnetoresistive properties. This provides new insights for the design of magnetoresistive sensors with unparalleled performance.
Article
Physics, Applied
Mahmoud Rasly, Tomoya Nakatani, Jiangnan Li, Hossein Sepehri-Amin, Hiroaki Sukegawa, Yuya Sakuraba
Summary: In this study, amorphous CoFeBTa (CFBT) was investigated as a soft magnetic layer for the free layer (FL) of magnetic tunnel junctions, leading to linear resistance-magnetic field (R-H) response curves with low hysteresis. The highest TMR ratio and sensitivity were achieved with a specific CFBT/Ta/CoFeB FL composition. The devices showed superior detectivity (D) for magnetic field sensing compared to previously reported TMR sensors with NiFe soft magnetic layers.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Roma Wirecka, Krzysztof Mackosz, Antoni Zywczak, Mateusz Marek Marzec, Szczepan Zapotoczny, Andrzej Bernasik
Summary: In this study, six nanocomposites based on different magnetic nanoparticles and a conducting polymer, poly(3-hexylthiophene-2,5-diyl) (P3HT), were synthesized. The nanoparticles were coated with either squalene and dodecanoic acid or P3HT, and the cores of the nanoparticles were made of nickel ferrite, cobalt ferrite, or magnetite. The average diameters of all synthesized nanoparticles were below 10 nm, with varying magnetic saturation at 300 K. The impact of different magnetic fillers on the conducting properties and the influence of the shell on the final electromagnetic properties of the nanocomposite were explored.
Article
Engineering, Electrical & Electronic
Clemens Muehlenhoff, Michal Krupinski, Arkadiusz Zarzycki, Manfred Albrecht
Summary: In this study, the magnetotransport properties of Co/Pt based perpendicular synthetic antiferromagnetic (p-SAF) structures with Ru interlayers were investigated. The number of Co/Pt multilayer (ML) stacks and Ru interlayers in the p-SAF structures were varied to examine changes in their magnetoresistive effects. The alignment of magnetization directions of the MLs in the ML/Ru/ML stacks of the p-SAF generated a giant magnetoresistance effect (GMR), while the anisotropic magnetoresistance effect (AMR) at each ML further influenced the resistance of the system. The study results have important implications for understanding and application of magnetoresistive effects.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Analytical
Voitech Stankevic, Nerija Zurauskiene, Skirmantas Kersulis, Valentina Plausinaitiene, Rasuole Lukose, Jonas Klimantavicius, Sonata Tolvaisiene, Martynas Skapas, Algirdas Selskis, Saulius Balevicius
Summary: This paper presents the colossal magnetoresistance (CMR) properties of La0.83Sr0.17Mn1.21O3 (LSMO) films grown using pulsed injection MOCVD technique on different substrates. The results show that the morphology, microstructure, and magnetoresistive properties of the films strongly depend on the substrate used. LSMO/quartz films exhibit higher low-field MR values and sensitivity, making them promising for magnetic sensor applications.
Article
Computer Science, Information Systems
Cristian Musuroi, Marius Volmer, Mihai Oproiu, Jenica Neamtu, Elena Helerea
Summary: A exchanged-biased anisotropic magnetoresistance bridge sensor for low currents measurement is designed and implemented using analytical and simulation methods. The sensor has high sensitivity and can be used in various sensor configurations.
Article
Nanoscience & Nanotechnology
Wenhao Xie, Feichong Yao, Hongbo Gu, Ai Du, Qin Lei, Nithesh Naik, Zhanhu Guo
Summary: A novel three-dimensional nanocomposite aerogel with outstanding magnetoresistance and piezoresistance was manufactured by surrounding magnetic reduced graphene oxide (rGO/Fe3O4) aerogel with in-situ polymerized polyaniline nanoarrays (PANI NAs). The aerogel exhibited excellent mechanical strength, preserved its porous structure, and showed a promising performance in terms of recovery ratio, piezoresistive performance, and magnetoresistance.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Jinwen Wang, Xuan Xiao, Zhihong Deng, Mengyin Fu
Summary: Due to the complex and harsh launching and flying environment, gyros strapdown to projectile is prone to failure and cannot accurately sense projectile angular rate. This article establishes an online estimation model of projectile angular rate, which describes the mathematical relationship among the output information of magnetoresistive sensors, the angular rate of gyro output, and attitude matrix. In order to achieve real-time estimation of projectile angular rate, an improved sparrow search algorithm (ISSA) is proposed, which combines adaptive dynamic step strategy with dynamic compression search strategy, improving the traditional SSA. This method takes angular rate as the optimization object and uses the ISSA diagonal rate estimation model to solve and obtain high-precision estimation of angular rate. The simulation results verify the correctness and feasibility of the online estimation model of projectile angular rate using only magnetoresistive sensors, and the precision of angular rate estimation based on the ISSA is better than that of the traditional intelligent optimization algorithm.
IEEE SENSORS JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Byeonghwa Lim, Mohamed Mahfoud, Proloy T. Das, Taehyeong Jeon, Changyeop Jeon, Mijin Kim, Trung-Kien Nguyen, Quang-Hung Tran, Ferial Terki, CheolGi Kim
Summary: Advancements in micro- and nanotechnology have facilitated the rapid adoption of spintronic sensors with high sensitivity and ultra-low field detectivity. These sensors are well-suited for smart sensing applications in various fields and possess characteristics that make them highly competitive, including customization and miniaturization capabilities, ease of integration, and cost-effectiveness for mass production.
Article
Instruments & Instrumentation
Xiaolin Li, Jiangtao Zhang, Luyan Shen, Liming Qin, Qiang Fu, Youyi Sun, Yaqing Liu
Summary: A novel magnetoresistance material based on MRF was developed by dispersing CIP into MIL, showing excellent magnetoresistance characteristics and displacement sensing capabilities.
SMART MATERIALS AND STRUCTURES
(2021)
Article
Nanoscience & Nanotechnology
Svenja Willing, Kai Schlage, Lars Bocklage, Mohammad Mehdi Ramin Moayed, Tatiana Gurieva, Guido Meier, Ralf Roehlsberger
Summary: This study explores the application of oblique-incidence deposition (OID) technology to introduce anisotropy in the magnetic properties of thin films, aiming to control and optimize the magnetic response of TMR devices. Using OID technology not only eliminates the need for additional magnetic contact materials, but also enables targeted control of shape anisotropy, providing new possibilities for TMR device design.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Biomaterials
Arturo Vera, Isidoro Martinez, Luiz Guilherme Enger, Bruno Guillet, Ruben Guerrero, Jose Manuel Diez, Olivier Rousseau, Marc Lam Chok Sing, Victor Pierron, Paolo Perna, Jaime J. Hernandez, Isabel Rodriguez, Ivo Calaresu, Anja Meier, Carmen Huck, Ana Dominguez-Bajo, Ankor Gonzalez-Mayorga, Elisa Lopez-Dolado, Maria C. Serrano, Laura Ballerini, Lucas Perez, Rodolfo Miranda, Stephane Flament, Maria Teresa Gonzalez, Laurence Mechin, Julio Camarero
Summary: We have developed an implantable neural interface based on anisotropic magnetoresistive (AMR) magnetic-field sensors, which have reduced size and high performance at body temperature. The sensors use La0.67Sr0.33MnO3 (LSMO) as a ferromagnetic material, engineered to have uniaxial anisotropy and large AMR output with low noise even at low frequencies. The LSMO sensors have been optimized to detect low magnetic signals from neural activity with a sensitivity of approximately 400%/T, making them suitable for implantable detectors.
ACS BIOMATERIALS SCIENCE & ENGINEERING
(2023)
Article
Physics, Applied
Dolly Taparia, Kresna Bondan Fathoni, Prabhanjan Dilip Kulkarni, Ananthakrishnan Srinivasan, Perumal Alagarsamy, Yuya Sakuraba, Tomoya Nakatani, Taisuke Sasaki, Kazuhiro Hono
Summary: A new CIP-GMR device with a combination of two spacer materials has been developed, demonstrating large MR ratio and linear response, leading to increased linear sensitivity with a biquadratic coupling. These findings indicate promising potential for wide dynamic range magnetic sensors.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
S. Swathi, K. Arun, U. Remya, S. R. Athul, Andrea Dzubinska, Marian Reiffers, R. Nagalakshmi
Summary: An off-stoichiometric Ni-Mn-In Heusler alloy was synthesized and studied for its magnetocaloric and magnetoresistive properties. The alloy exhibited co-existing austenite and martensite phases at room temperature. A metamagnetic transition was observed near the martensite transformation temperature, resulting in negative sloped-Arrott curves. The alloy also showed large magnetoresistance and moderate entropy change around the austenite-ferromagnetic transition. The Ni48Ag2Mn37In13 alloy demonstrated significant room temperature magnetocaloric effect and low thermal and magnetic hysteresis.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Review
Engineering, Electrical & Electronic
Ran Jia, Liyong Wang, Changsong Zheng, Tao Chen
Summary: This paper presents a review of the state-of-the-art wear debris detectors based on different principles, including optical/imaging, electrical, ultrasonic, and magnetic detection. Optical/imaging and magnetic detectors have shown promising potential in wear monitoring, but there is a need for improving their performance and sensitivity. Future research directions include integrated wear monitoring systems and intelligent wear particle detectors.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Physical
Nadine Fokin, Timo Grothe, Al Mamun, Marah Trabelsi, Michaela Kloecker, Lilia Sabantina, Christoph Doepke, Tomasz Blachowicz, Andreas Huetten, Andrea Ehrmann
Article
Cell Biology
Thomas Vordemvenne, Dirk Waehnert, Julian Koettnitz, Madlen Merten, Nadine Fokin, Andreas Becker, Bjoern Bueker, Asaria Vogel, Daniel Kronenberg, Richard Stange, Guenther Wittenberg, Johannes F. W. Greiner, Andreas Huetten, Christian Kaltschmidt, Barbara Kaltschmidt
Article
Chemistry, Multidisciplinary
Martin Wortmann, Natalie Frese, Al Mamun, Marah Trabelsi, Waldemar Keil, Bjoern Bueker, Ali Javed, Michael Tiemann, Elmar Moritzer, Andrea Ehrmann, Andreas Huetten, Claudia Schmidt, Armin Goelzhaeuser, Bruno Huesgen, Lilia Sabantina
Article
Physics, Multidisciplinary
Andreas Becker, Daniela Ramermann, Inga Ennen, Bjorn Buker, Tristan Matalla-Wagner, Martin Gottschalk, Andreas Hutten
Summary: The study focused on hysteresis and transformation behavior in epitaxial NiCoMnAl magnetic shape memory alloy thin films with varying number of martensitic intercalations. Changes in composition and thickness can lead to different levels of residual austenite and a shift in hysteresis temperature.
Article
Microbiology
Ehsan Asghari, Annika Kiel, Bernhard Peter Kaltschmidt, Martin Wortmann, Nadine Schmidt, Bruno Huesgen, Andreas Huetten, Cornelius Knabbe, Christian Kaltschmidt, Barbara Kaltschmidt
Summary: New ecological trends and changes in consumer behavior are leading to increased biofilm formation in household appliances, creating a demand for new antimicrobial materials and surfaces. Laboratory-cultivated biofilms identified bacterial strains using MALDI-TOF-MS and analyzed the main genera found in these habitats, such as Staphylococci and pseudomonads, offering better understanding of biofilm formation mechanisms.
Article
Chemistry, Multidisciplinary
Daniela Ramermann, Andreas Becker, Bjoern Buker, Andreas Huetten, Inga Ennen
Summary: The magnetic shape memory Heusler alloy NiCoMnAl exhibits a long-range ordering phenomenon in a 3D checkerboard pattern, with martensite and austenite regions distinguished by their brightness in TEM cross sections. The nucleation process is thought to be triggered by inhomogeneous local elastic stray fields of primary martensitic nuclei in the austenite matrix, limited by the thicknesses of the martensite and austenite thin films.
APPLIED SCIENCES-BASEL
(2022)
Article
Microbiology
Annika Kiel, Bernhard Peter Kaltschmidt, Ehsan Asghari, Andreas Huetten, Barbara Kaltschmidt, Christian Kaltschmidt
Summary: The COVID-19 pandemic has led to an increased demand for personal protection equipment, including face masks, in the medical field. One innovative approach to address this demand is the use of 3D printed masks. However, the potential microbial load on these 3D printed masks has often been overlooked. In this study, the biofilm formation of different bacteria species on antimicrobial and non-antimicrobial 3D printing filaments was analyzed. The results suggest that the antimicrobial PLA used in the 3D printing filaments does not significantly affect Gram-negative bacteria, indicating that reusable masks may pose a health risk.
Article
Materials Science, Multidisciplinary
E. Yuzuak, G. D. Yuzuak, I Ennen, A. Huetten
Summary: This study systematically investigated the properties of Tb(25)Fe(6)1Co(14) thin films and found that increasing the thickness of the Pt underlayer helped enhance the perpendicular magnetic anisotropy. It was also discovered that these films exhibited out-of-plane magnetic anisotropy even without annealing.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Microbiology
Bernhard Peter Kaltschmidt, Ehsan Asghari, Annika Kiel, Julian Cremer, Dario Anselmetti, Christian Kaltschmidt, Barbara Kaltschmidt, Andreas Huetten
Summary: This study investigated the application of magnetron sputtering of various transition metals in antimicrobial coatings, finding that gold had the strongest antibacterial effect. These antimicrobial coatings show great potential for application on household appliances and surgical instruments.
Article
Microbiology
Annika Kiel, Ines Creutz, Christian Rueckert, Bernhard Peter Kaltschmidt, Andreas Huetten, Karsten Niehaus, Tobias Busche, Barbara Kaltschmidt, Christian Kaltschmidt
Summary: Opportunistic pathogens like Pseudomonas aeruginosa exist in household washing machines, and four novel strains of P. aeruginosa isolated from different parts of household appliances showed varying biofilm formation. Whole genome sequencing revealed a correlation between biofilm phenotypes and gene compositions, suggesting the involvement of certain genes and prophages in biofilm formation. These findings enhance our understanding of the adaptability and pathogenicity of clinically relevant pathogens in household appliances.
Article
Microbiology
Ehsan Asghari, Bernhard Peter Kaltschmidt, Luis van Merwyk, Thomas Huser, Christian Kaltschmidt, Andreas Huetten, Barbara Kaltschmidt
Summary: Microorganisms forming a biofilm can develop multidrug resistance through information exchange. These multidrug-resistant, biofilm-producing microorganisms are responsible for many hospital-acquired infections and also cause significant damage in industrial sectors. In this study, nanoparticles of nickel and nickel oxide were found to have the highest antibacterial efficacy against Pseudomonas aeruginosa and Staphylococcus aureus isolated from household appliances. Interestingly, only P. aeruginosa was able to survive at high concentrations due to clustering toxic nanoparticles through biofilm formation.
Article
Polymer Science
Julian Cremer, Bernhard P. Kaltschmidt, Annika Kiel, Jens Eberhard, Stephan Schmidt, Christian Kaltschmidt, Barbara Kaltschmidt, Andreas Huetten, Dario Anselmetti
Summary: The aging-induced surface-covering EBS layers changed the surface morphology, promoting bacterial adhesion and biofilm formation of Pseudomonas aeruginosa. This study provides insight into the time-dependent, polymer-liquid interface aging process of industrial performance polypropylene samples and highlights the detrimental effects of EBS on surface transformation and degradation.
Review
Materials Science, Multidisciplinary
Tomasz Blachowicz, Andreas Huetten, Andrea Ehrmann
Summary: This paper reviews recent advances in nanofiber mats for electromagnetic interference (EMI) shielding, focusing on their production, physical properties, and typical characterization techniques.
Article
Materials Science, Multidisciplinary
Bjoern Bueker, JinWon Jung, Taisuke Sasaki, Yuya Sakuraba, Yoshio Miura, Tomoya Nakatani, Andreas Huetten, Kazuhiro Hono
Summary: The study demonstrates that even a monolayer near the interface critically affects the interfacial band matching and magnetoresistance properties between ferromagnetic and nonmagnetic metals.
Article
Materials Science, Multidisciplinary
Jan Lukas Storck, Bennet Brockhagen, Timo Grothe, Lilia Sabantina, Bernhard Kaltschmidt, Khorolsuren Tuvshinbayar, Laura Braun, Ewin Tanzli, Andreas Huetten, Andrea Ehrmann
Summary: Electrospinning PAN onto aluminum foils and stabilizing them on the substrates is an effective solution for maintaining the desired morphology during stabilization and incipient carbonization. Stabilization on a metal substrate at slightly above 240 degrees C with a heating rate of 0.25 K/min leads to fewer defect fibers in the resulting nanofiber mats. High-temperature carbonization on different substrates enables the production of metal/carbon nano-composites.
C-JOURNAL OF CARBON RESEARCH
(2021)
