scholarly journals Paper-Based Magneto-Resistive Sensor: Modeling, Fabrication, Characterization, and Application

Sensors ◽  
2018 ◽  
Vol 18 (12) ◽  
pp. 4392 ◽  
Author(s):  
Meriem Akin ◽  
Autumn Pratt ◽  
Jennifer Blackburn ◽  
Andreas Dietzel
Keyword(s):  
Thin Film ◽  
Base Resistance ◽  
Paper Substrate ◽  
Fiber Network ◽  
Sensitivity Range ◽  
Resistive Sensor ◽  
Magnetic Loading ◽  
Peak Location ◽  
Sensor Modeling ◽  
Magneto Resistance

In this work, we developed and fabricated a paper-based anisotropic magneto-resistive sensor using a sputtered permalloy (Ni 81 Fe 19 ) thin film. To interpret the characteristics of the sensor, we proposed a computational model to capture the influence of the stochastic fiber network of the paper surface and to explain the physics behind the empirically observed difference in paper-based anisotropic magneto-resistance (AMR). Using the model, we verified two main empirical observations: (1) The stochastic fiber network of the paper substrate induces a shift of 45 ∘ in the AMR response of the paper-based Ni 81 Fe 19 thin film compared to a Ni 81 Fe 19 film on a smooth surface as long as the fibrous topography has not become buried. (2) The ratio of magnitudes of AMR peaks at different anisotropy angles and the inverted AMR peak at the 90 ∘ -anisotropy angle are explained through the superposition of the responses of Ni 81 Fe 19 inheriting the fibrous topography and smoother Ni 81 Fe 19 on buried fibrous topographies. As for the sensitivity and reproducibility of the sensor signal, we obtained a maximum AMR peak of 0 . 4 % , min-max sensitivity range of [ 0 . 17 , 0 . 26 ] % , average asymmetry of peak location of 2 . 7 kA m within two consecutive magnetic loading cycles, and a deviation of 250–850 A m of peak location across several anisotropy angles at a base resistance of ∼100 Ω . Last, we demonstrated the usability of the sensor in two educational application examples: a textbook clicker and interactive braille flashcards.

Sputter Deposition of Fe-Co Nitride for Ferromagnetic Granular Nitride Thin Film

2009 ◽  
Vol 631-632 ◽  
pp. 327-331 ◽  
Author(s):  
K. Sakon ◽  
Y. Hirokawa ◽  
Yasuji Masubuchi ◽  
Shinichi Kikkawa
Keyword(s):  
Thin Film ◽  
Solid Solution ◽  
Thermal Decomposition ◽  
Sputter Deposition ◽  
Composite Target ◽  
Zinc Blende ◽  
Alloy Particles ◽  
Sputter Deposited ◽  
Magneto Resistance ◽  
Zinc Blende Structure

Sputter deposited Fe0.7Co0.3 nitride thin film had zinc blende structure. It was thermally decomposed completely back to the ferromagnetic Fe0.7Co0.3 alloy above 400°C. As-deposited nitride thin films obtained in cosputtering of (Fe0.7Co0.3)1-xAlx composite target with nitrogen sputter gas were solid solutions with zinc blende (x≤0.44) and wurtzite (x>0.5) type structure, respectively. The largest magneto resistance ratio of 0.24% was observed on the Fe0.7Co0.3 alloy particles dispersed in AlN thin film obtained by thermal decomposition of the nitride solid solution with x=0.66 at 500°C.

Magnetisation and Magneto-Resistance Study of Ferromagnetic Metal/Half Metallic Double Perovskite Bi-Layers

2011 ◽  
Vol 700 ◽  
pp. 33-36 ◽  
Author(s):  
Duncan M. McCann ◽  
Grant V. M. Williams ◽  
Adam R. Hyndman ◽  
Jibu Stephen
Keyword(s):  
Thin Film ◽  
Curie Temperature ◽  
Double Perovskite ◽  
Ferromagnetic Metal ◽  
Half Metallic ◽  
Layer Film ◽  
Anomalous Peak ◽  
Magneto Resistance

We observe a large magneto-resistance in very thin Ba2FeMoO6films of ~-12% at 10K, which is not significantly changed when thin NiFe/Ba2FeMoO6bi-layers are made. This suggests that the magneto-resistance in both cases is dominated by inter-grain tunnelling in the Ba2FeMoO6thin film. There is an anomalous peak in the resistance at ~300K in the bi-layer film that can not be easily explained. However, we know that the temperature where this peak occurs is close to the Ba2FeMoO6Curie temperature.

Organic Thin Film Transiators on Synthesis Paper

2006 ◽  
Vol 965 ◽  
Author(s):  
Hua-Chi Cheng ◽  
Yu-Rung Peng ◽  
Chao-An Chung ◽  
Wei-Hsin Hou ◽  
Zing-Way Pei
Keyword(s):  
Thin Film ◽  
High Performance ◽  
Gate Dielectric ◽  
Thin Film Transistor ◽  
Organic Transistors ◽  
Organic Thin Film ◽  
Paper Substrate ◽  
Organic Transistor ◽  
The Cost ◽  
Slit Die

ABSTRACTWe have demonstrated organic thin-film transistor devices on synthesis paper of polypropylene (PP). All the fabrications are in solution-based processes except electrodes. As a barrier and smoother layer, photosensitive epoxy, 5μm-thich was coated on the paper substrate by using slit die coating. Polyvinyl phenol (PVP) was mixed with poly (melamine-co-formaldehyde) methylated, filmed by spin coating and ultraviolet (UV) cross linked to provide the gate dielectric layer. Using poly (3-hexylthiophene) as an active layer, a high-performance organic transistor with field effect mobility up to 0.006 cm2/ V s and an on/off ratio of 50 can be achieved. For the applications in flexible and disposable electronics, to built organic transistors on a cheap synthesis paper substrate can extremely lower the cost.

scholarly journals Characterization of drop-casted graphene/cellulose thin film on printing paper substrate

2020 ◽  
Vol 19 (2) ◽  
pp. 680
Author(s):  
Amirul Hadi Azmi ◽  
Shaharin Fadzli Abd Rahman ◽  
Mastura Shafinaz Zainal Abidin
Keyword(s):  
Thin Film ◽  
Sheet Resistance ◽  
Low Cost ◽  
Cellulose Solution ◽  
Wearable Electronics ◽  
Paper Substrate ◽  
Paper Electronics ◽  
Printing Paper ◽  
Printing Papers

Paper electronics is an emerging technology to implement flexible and wearable electronics devices via ink printing process. This paper evaluates the feasibility of using conventional printing paper for coating process with graphene/cellulose ink. 4 different types of regularly used conventional printing papers were used as substrates in this work. The conductive graphene ink was prepared through exfoliation of graphite in cellulose solution. The paper substrates surface morphology and sheet resistance of the drop-casted conductive ink on each paper were analyzed and discussed. Glossy paper was found to be suitable paper substrate for the printing of the formulated ink due to its low surface roughness of 16 nm. The value of sheet resistance of the graphene/cellulose thin film can be lowered to 4.11 kΩ/sq by applying multiple drops. This work suggests that conventional printing paper may offer solution for highly scalable and low-cost paper electronics.

Hall Effect and Magneto Resistance of Y0.5Ca0.5Ba2Cu3O7-δ Thin Film in The Mixed State

1996 ◽  
pp. 85-88
Author(s):  
Hisataka Yakabe ◽  
Kohichi Nakao ◽  
Yuh Shiohara ◽  
Naoki Koshizuka
Keyword(s):  
Thin Film ◽  
Hall Effect ◽  
Mixed State ◽  
Magneto Resistance

Versatile Low Temperature and High Magnetic Field Thermometers: The Low Temperature Magneto Resistance of Thin Film Cermets

1987 ◽  
Vol 26 (S3-2) ◽  
pp. 1741 ◽  
Author(s):  
N. A. Gershenfeld ◽  
J. Van Cleve ◽  
M. J. Graf ◽  
N. A. Fortune ◽  
J. S. Brooks
Keyword(s):  
Magnetic Field ◽  
Thin Film ◽  
Low Temperature ◽  
High Magnetic Field ◽  
Magneto Resistance

Hydration and Crosslinking Effects on the Elastic and Viscoelastic Properties of Collagen Scaffolds

2011 ◽  
Author(s):  
Bin Xu ◽  
Katherine Yanhang Zhang
Keyword(s):  
Thin Film ◽  
Solid Phase ◽  
Great Influence ◽  
Collagen Gel ◽  
Fluid Phase ◽  
The Body ◽  
Collagen Gels ◽  
Collagen Scaffolds ◽  
Fiber Network

Collagen is the most abundant protein in the body. It plays critical roles in many supporting and connecting tissues such as tendon, ligament, bone, blood vessels, skin, etc. Collagen gels prepared from commercially available collagen solutions mimic the in vivo environment and have been widely used as three-dimensional (3-D) tissue scaffolds for cell culture. Collagen thin film is the dehydrated form of collagen gel. A number of studies have examined the cell-collagen thin film interactions (1, 2). As a biphasic material, collagen scaffolds contain a solid phase which represents by collagen fiber network and an interstitial fluid phase (3). This special structure makes collagen a viscoelastic material. Viscoelasticity is related to force or energy storage, transmission and dissipation in tissues and has a great influence on the growth and development of cells (4).

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