Study of Purity and Electrical Resistivity of Eu&lt;sub&gt;1.91&lt;/sub&gt;Ce&lt;sub&gt;0.09&lt;/sub&gt;CuO&lt;sub&gt;4&lt;/sub&gt; and Eu&lt;sub&gt;1.84&lt;/sub&gt;Ce&lt;sub&gt;0.16&lt;/sub&gt;CuO&lt;sub&gt;4&lt;/sub&gt;

Tayubi, Yuyu Rachmat; Maryati, Yati; Nafisah, Nur'aini; Auliya, Diba Grace; Nurwati, Eka; Amalia, Tiara; Syakuur, Muhammad Abdan; Wiendartun,; Feranie, Selly; Saragi, Togar; Risdiana, Risdiana

doi:10.4028/www.scientific.net/kem.860.160

Cited by 3 publications

(2 citation statements)

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“…Puncak utama struktur kristal tetragonal T' yang umum ditemukan pada system superkonduktor doping elektron pada indeks Miller (103) dan (110) ditunjukkan pada Gambar 1(c-d). Hasil ini menunjukkan bahwa proses sintesis telah berhasil dilakukan dengan mendapatkan struktur kristal yang sesuai dengan literatur [4][5][6][7][8][9][10][11]. Gejala superkonduktivitas umumnya dapat ditentukan dengan adanya interaksi atom pada lapisan konduksi yang berasal dari charge reservoir.…”

Section: Hasil Dan Pembahasanunclassified

STUDI KORELASI STRUKTUR TERHADAP SUHU TRANSISI SUPERKONDUKTOR DOPING ELEKTRON Eu2-xCexCuO4+α-δ

MARYATI,

WINARSIH,

SYAKUR

et al. 2021

JME

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Superkonduktor doping elektron Eu2-xCexCuO4+α-δ telah berhasil disintesis dengan konsentrasi doping Ce x = 0.10 dan x = 0.15 untuk mempelajari hubungan antara struktur kristal dengan sifat fisis pada sistem superkonduktor berbasis cuprate. Dilakukan karakterisasi X-Ray Diffraction untuk mempelajari struktur kristal, dan pengukuran resistivitas dilakukan untuk mengamati adanya gejala superkonduktivitas pada bahan. Nilai parameter kisi c dan panjang ikatan Eu-O2 menurun seiring dengan meningkatnya konsentrasi doping, akibat adanya penggantian sebagian atom Eu oleh atom Ce. Penurunan nilai panjang ikatan Eu-O2 berkorelasi dengan niali Tc yang dihasilkan pada superkonduktor doping elektron Eu2-xCexCuO4+α-δ.

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Section: Hasil Dan Pembahasanunclassified

STUDI KORELASI STRUKTUR TERHADAP SUHU TRANSISI SUPERKONDUKTOR DOPING ELEKTRON Eu2-xCexCuO4+α-δ

MARYATI,

WINARSIH,

SYAKUR

et al. 2021

JME

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“…In our previous study, it was found that Eu 2– x Ce x CuO 4+α–δ exhibited a bad metal when x = 0.09, 0.15, and 0.16 in the normal state, indicating an increase in resistivity. 11 , 12 Here, we expand the Ce concentration of Eu 2– x Ce x CuO 4+α–δ from an underdoped regime to an overdoped regime to study the electrical properties in the normal state. The Arrhenius law and Mott’s variable range hopping (VRH) model were used for analyzing the carrier transport mechanism.…”

Section: Introductionmentioning

confidence: 99%

Structural Properties and Hopping Conduction in the Normal State of Electron-Doped Superconductor Cuprate Eu_2–xCe_xCuO_4+α–δ

et al. 2022

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Electron-doped superconducting cuprate of Eu 2– x Ce x CuO 4+α–δ has been studied in the whole doping regime from x = 0.10–0.20 with reducing oxygen content to investigate the relation between the crystal structure and the hopping conduction in the normal state. Parameter of the crystal structure has been extracted from the X-ray diffraction (XRD) measurement while hopping conduction parameters have been obtained from resistivity measurements. The Eu–O bond length decreases with the increasing doping concentration, indicating the successful doping by the partial replacing of Eu 3+ with Ce 4+ . The resistivity increases with decreasing temperature in all measured samples. This is an indication of bad metal-like behavior in the whole regime in the normal state of electron-doped superconducting cuprate of Eu 2– x Ce x CuO 4+α–δ . The temperature dependence of resistivity was analyzed by the Arrhenius law and the variable range hopping model. It is found that the hopping conduction mechanism more likely follows the variable range hopping rather than the Arrhenius law, indicating that the hopping mechanism occurs in three dimensions. The Cu–O bond length probably plays an important role in decreasing the activation energy. The decreasing value of the activation energy correlates with the increase in the localization radius.

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Study of Phase Purity of Eu2-xCexCuO4 Synthesized by Solid State Method without Annealing Process

Tayubi

Maryati

Syakuur

et al. 2021

MSF

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The samples of Eu2-xCexCuO4 (ECCO) with x = 0.10, 0.13, 0.17 and 0.20 have been synthesized by the solid reaction method without annealing process [1,2]. Each sample is covered by CuO powder to prevent excess oxygen entering the sample during heating process. The purpose of this research is to study the crystal structure and the level of phase purity in ECCO samples in the wide ranges of doping concentration of ECCO. The results of X-ray diffraction (XRD) characterization showed that the main peaks of T' tetragonal structure were observed in all samples. From the XRD analysis, it was found that the level of phase purity of ECCO was 100 % for x = 0.10, 100 % for x = 0.13, 79.5.% for x = 0.17, and 79.1 % for x = 0.20, respectively. For the lattice constant, it is found that both a and c-axis did not change significantly as the concentration increased. These results show that the synthesis method with CuO covering has succeeded in synthesizing materials with high phase purity although the constants do not change significantly when the concentration increased. However, there are some impurity phases found in high concentration of x that is probably due to the existence of excess oxygen, which was not fully absorbed by CuO Covering.

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Study of Purity and Electrical Resistivity of Eu<sub>1.91</sub>Ce<sub>0.09</sub>CuO<sub>4</sub> and Eu<sub>1.84</sub>Ce<sub>0.16</sub>CuO<sub>4</sub>

Cited by 3 publications

References 11 publications

STUDI KORELASI STRUKTUR TERHADAP SUHU TRANSISI SUPERKONDUKTOR DOPING ELEKTRON Eu2-xCexCuO4+α-δ

STUDI KORELASI STRUKTUR TERHADAP SUHU TRANSISI SUPERKONDUKTOR DOPING ELEKTRON Eu2-xCexCuO4+α-δ

Structural Properties and Hopping Conduction in the Normal State of Electron-Doped Superconductor Cuprate Eu_2–xCe_xCuO_4+α–δ

Study of Phase Purity of Eu<sub>2-x</sub>Ce<sub>x</sub>CuO<sub>4</sub> Synthesized by Solid State Method without Annealing Process

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Study of Purity and Electrical Resistivity of Eu<sub>1.91</sub>Ce<sub>0.09</sub>CuO<sub>4</sub> and Eu<sub>1.84</sub>Ce<sub>0.16</sub>CuO<sub>4</sub>

Cited by 3 publications

References 11 publications

STUDI KORELASI STRUKTUR TERHADAP SUHU TRANSISI SUPERKONDUKTOR DOPING ELEKTRON Eu2-xCexCuO4+α-δ

STUDI KORELASI STRUKTUR TERHADAP SUHU TRANSISI SUPERKONDUKTOR DOPING ELEKTRON Eu2-xCexCuO4+α-δ

Structural Properties and Hopping Conduction in the Normal State of Electron-Doped Superconductor Cuprate Eu2–xCexCuO4+α–δ

Study of Phase Purity of Eu<sub>2-x</sub>Ce<sub>x</sub>CuO<sub>4</sub> Synthesized by Solid State Method without Annealing Process

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Structural Properties and Hopping Conduction in the Normal State of Electron-Doped Superconductor Cuprate Eu_2–xCe_xCuO_4+α–δ