Arista, Cindy Mulya (2019) Sintesis dan Karakterisasi Superkonduktor FeSe1-xTex(x=0,5 dan 0,75). Other thesis, Institut Teknologi Sepuluh Nopember.
Preview |
Text
01111540000049-Undergraduate_Theses.pdf Download (4MB) | Preview |
Abstract
Superkonduktor merupakan material yang dapat menghantarkan arus listrik tanpa adanya hambatan (ρ=0) di bawah temperatur kritis (Tc) tertentu. Di antara superkonduktor berstruktur sederhana dan non-arsenic yaitu berbasis besi (FeSe), dimana nilai temperatur kritis (Tc) nya dapat ditingkatkan dengan doping Telurium. Material superkonduktor FeSe1-xTex (x=0,5 dan 0,75) telah berhasil disintesis dengan metode solid-state reaction dengan bahan dasar serbuk Besi (Fe), Selenium (Se), dan Telurium (Te). Tujuan dari penelitian ini adalah untuk mengetahui pengaruh komposisi doping Telurium dan temperatur sintering terhadap struktur dan fasa yang terbentuk, morfologi permukaan dan komposisi unsur serta sifat superkonduktivitas. Proses sintering dilakukan dalam kondisi vakum dengan variasi suhu 750°C dan 800°C dan dilanjutkan dengan proses kompaksi. Karakterisasi sampel meliputi pengujian XRD, SEM, dan Resistivitas sebagai fungsi suhu. Hasil karakterisasi dengan XRD menunjukkan bahwa terbentuk fasa superkonduktor β-FeSe dengan struktur kristal tetragonal pada masing-masing variasi. Citra morfologi SEM memperlihatkan superkonduktor Fe(Se,Te) berupa granula yang teraglomerasi dan hasil EDX menunjukkan unsur besi (Fe) berlebih pada dua sampel untuk variasi doping Telurium. Sedangkan dari hasil karakterisasi resisitivitas sebagai fungsi suhu didapatkan bahwa nilai suhu kritis sebesar 13 K dengan doping Telurium sebesar 75%.
===================================================================================================================================
Superconductors are materials that can conduct electric current without any resistivity (ρ= 0) below a certain critical temperature (Tc). Among simple and non-arsenic superconductors are iron based (FeSe) , where the critical temperature (Tc) can be increased by telurium (Te) doping. The FeSe1-xTex (x= 0.5 and 0.75) superconductors were successfully synthesized by solid-state reaction method with the basic ingredients of iron (Fe), selenium (Se), and telurium (Te) powders. The purpose of this research was to determine the effect of Te doping composition and sintering temperature variations on the formed structure and phase, surface morphology, and superconductivity properties. The sintering process was carried out in a vacuum with a temperature variation of 750 °C and 800 °C and followed by a compacting process. Sample characterization by XRD, SEM, and resistivity as a function of temperature were carried out. The result of characterization with XRD shows the superconducting phase structure of β-FeSe with tetragonal crystal structure in each variation. The morphological image of SEM shows that Fe(Se,Te) superconductors consists of agglomerated granules and EDX results shows that iron (Fe) is excessive in two samples for variations of Te doping. Meanwhile, from the characterization of resistivity as a function of temperature has been obtained critical temperature of 13 K for 75% Te – doped sample.
Keywords : Critical temperature, FeSe1-xTex, resistivity, sintering.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | FeSe1-xTex, resistivitas, sintering, temperatur kritis. |
| Subjects: | Q Science Q Science > QC Physics > QC271 Temperature measurements |
| Divisions: | Faculty of Natural Science > Physics > 45201-(S1) Undergraduate Thesis |
| Depositing User: | Cindy Mulya Arista |
| Date Deposited: | 20 Jul 2026 02:45 |
| Last Modified: | 20 Jul 2026 02:45 |
| URI: | http://repository.its.ac.id/id/eprint/66177 |
Actions (login required)
 |
View Item |