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Abstrak :
We have performed resistivity measurements as a function of temperature, with and without an external magnetic field. Magnetization measurements are also done as a function of temperature M(T) as well as a function of an external magnetic field M(H) for La0.73Ca0.27Mn1-xCuxO3 compounds with 0

Abstrak :
Sensor pick-up coil telah dibuat sebagai alat ukur medan magnet yang berubah terhadap waktu. Sistem ini dapat mengukur medan magnet pada solenoid yang dialiri arus dan hasilnya ditampilkan pada panel LabVIEW. Sensor pick-up coil yang digunakan pada penelitian ini berupa lilitan kawat email 0,5mm yang digunakan untuk mendeteksi medan magnet di dalam solenoid. Kumparan sensor pickup coil akan memberikan output berupa tegangan keluaran berdasarkan prinsip perubahan fluks magnetik. Alat ukur ini dapat mengukur medan magnet dengan batas pengukuran 8 hingga 150 Gauss.

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Sensor coil pick-up have been designed and constructed to measure time varying magnetic field. This system can measure the magnetic field when the solenoid is energized and the results are displayed in the LabVIEW. Pick-up coil sensor used in this research of 0.5 mm wire windings used to detect the magnetic field inside the solenoid. Sensor coil pickup coil has output a voltage based on the principle of change of magnetic flux. This instrument has can measure the magnetic field with the limits of 8 to 150 Gauss.

Abstrak :
Koefisien difusi merupakan nilai besaran yang menjadi karakterisasi perambatan konsentrasi di antara dua atau lebih zat yang sedang bercampur. Proses difusi memiliki peran penting dalam berbagai aplikasi di bidang kimia, industri, serta dalam kontrol polusi. Metode Wiener’s digunakan untuk memperoleh koefisien difusi larutan karena metode ini dianggap paling efektif dan akurat. Metode ini dipadukan dengan image processing menggunakan Python 3.9 untuk memperoleh nilai koefisien difusi dengan cepat dan akurat. Variasi medan magnet diberikan untuk mengetahui repon sistem, didapat pada larutan dengan kandungan unsur logam didalamnya akan terjadi surface plasmon resonance yang akan mengurangi koefisien difusi larutan-larutan tersebut. Menggunakan sistem ini didapat besar DNaCl-Akuades,DNaCl-Nanogold dan DNaCl-SBF dengan R^2 >= 0.95 Berdasarkan nilai tersebut diperoleh deteksi tepi Sobel lebih baik dari Canny. .......The difusion coefficient is a quantity that characterizes the concentration propagation between two or more substances that are mixed. Difusion processes have an important role in a wide range of applications in chemistry, industry, and pollution control. The Wiener experiment Setup method is used to obtain the diffusion coefficient of the solution because this method is considered the most effective and accurate. This method is combined with image processing using Python 3.9 to obtain the value of the difusion coefficient fast and accurately. The variation of the magnetic field given to determine the response system, obtained in a solution containing metal elements where in it will occur surface plasmon resonance which will reduce the difusion coefficient of these solutions. Using this system, we get DNaCl-Akuades,DNaCl-Nanogold and DNaCl-SBF are obtained with a value of R^2 >= 0.95. Based on this value, the Sobel edge detection is better than Canny.

Abstrak :
This thesis presents a novel method for fabricating the smallest superconducting quantum interference device (SQUID) that resides on the apex of a very sharp tip. The nanoSQUID-on-tip displays a characteristic size down to 100 nm and a field sensitivity of 10^-3 Gauss/Hz^(1/2). A scanning SQUID microsope was constructed by gluing the nanoSQUID-on-tip to a quartz tuning-fork. This enabled the nanoSQUID to be scanned within nanometers of the sample surface, providing simultaneous images of sample topography and the magnetic field distribution. This microscope represents a significant improvement over the existing scanning SQUID techniques and is expected to be able to image the spin of a single electron.