Magnetic Measurement Techniques for Thin Films and Small Particles

ABSTRACTThe principles of several of the most popular macroscopic magnetic measurement techniques are discussed for the vibrating sample magnetometer, SQUID magnetometer, ac susceptometer, ac force magnetometer, and torque magnetometers. These types of instruments are available commercially as stand-alone computer-controlled systems, Selected examples of recent measurements on thin films, small particles, and clusters of magnetic ions are presented.

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Magnetic Measurement Techniques for Locating Foreign Bodies in Humans

Biomag 96 ◽

10.1007/978-1-4612-1260-7_7 ◽

2000 ◽

pp. 28-31

Author(s):

E. Costa Monteiro ◽

C. Kelber ◽

E. Andrade Lima ◽

P. Costa Ribeiro ◽

A. C. Bruno ◽

...

Keyword(s):

Foreign Bodies ◽

Magnetic Measurement ◽

Measurement Techniques

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Thin Films: Stress Measurement Techniques

Reference Module in Materials Science and Materials Engineering ◽

10.1016/b978-0-12-803581-8.03330-0 ◽

2016 ◽

Author(s):

P.A. Flinn

Keyword(s):

Thin Films ◽

Stress Measurement ◽

Measurement Techniques

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Effect of MWCNT addition on the optical band gap of PVA/CS transient biocomposites

Journal of Composite Materials ◽

10.1177/00219983211037050 ◽

2021 ◽

pp. 002199832110370

Author(s):

Ömer Bahadır Mergen

Keyword(s):

Thin Films ◽

Electrical Properties ◽

Band Gap ◽

Optical Band Gap ◽

Rapid Development ◽

Measurement Techniques ◽

Resistivity Measurement ◽

Optical Parameters ◽

Optical And Electrical Properties ◽

Biocomposite Films

In recent years, as a result of increasing environmental concerns, biodegradable materials have gained great attention. With the rapid development of electronic technology, the importance of innovation and development of low-cost, sustainable, transient bioelectronics materials is increasing. In this research, the preparation of Poly(Vinyl Alcohol) (PVA), Chitosan (CS), and Multi-Walled Carbon nanotube (MWCNT) biocomposite films have been described. The solution mixing, ultrasonic mixing, and spin coating techniques were used to prepare the PVA/CS/MWCNT biocomposite thin films. UV–Vis absorption spectroscopy and two-point probe resistivity measurement techniques were used to study the optical and electrical properties of the biocomposite thin films. Optical band gap energies ( Eg) of PVA/CS/MWCNT biocomposites were obtained using the Tauc and Absorbance Spectrum Fitting (ASF) methods. Results obtained with both methods were found to be exactly the same. Experimental results have shown that with increasing MWCNT concentration, electrical conductivity (σ) increases from 1.75x10−16 S to 2.94x10−3 S, and Eg decreases significantly. At the same time, the fundamental optical parameters such as band tail (Urbach) energy ( Eu), refractive index ( n), absorption ( α), and extinction ( k) coefficient of the PVA/CS/MWCNT biocomposites were investigated in the UV-VIS range. The improvement observed in the optical and electrical properties of PVA/CS/MWCNT biocomposite films shows that these composites could be used as bioelectronics materials.

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Magnetic Measurement Techniques for Materials Characterization

10.1007/978-3-030-70443-8 ◽

2021 ◽

Keyword(s):

Magnetic Measurement ◽

Measurement Techniques ◽

Materials Characterization

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Co-Doped Tin Oxide Thin Films by Spin Coating

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.368-372.524 ◽

2008 ◽

Vol 368-372 ◽

pp. 524-525 ◽

Cited By ~ 5

Author(s):

Jian Li ◽

Shan Liu ◽

Wei Pan

Keyword(s):

Thin Films ◽

Tin Oxide ◽

Spin Coating ◽

Magnetic Measurement ◽

Optical Transmittance ◽

Solubility Limit ◽

Doping Content ◽

Oxide Thin Films ◽

Coating Method ◽

Co Doped

Co-doped tin oxide thin films were prepared using spin-coating method. Variation of doping content on the magnetic property and optical property were measured. XRD and magnetic measurement shows that Co solubility limit in SnO2 is less than 3%. When the doping content is lower than 3%, the films show good optical transmittance. When the doping content is reached to 10%, the optical transmittance became lower. When the solution is diluted, the optical transmittance drops more slowly.

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