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All Journal Atom Indonesia Journal Komputasi: Jurnal Ilmiah Ilmu Komputer dan Matematika Edusentris: Jurnal Ilmu Pendidikan dan Pengajaran Newton-Maxwell Journal of Physics
H. Hardhienata
Department Of Physics, Bogor Agricultural University Jl. Darmaga Gedung Wing S Bogor16680, Indonesia
Astronomy Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Physics Other

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 1 
Surface Roughness and Grain Size Characterization of Annealing Temperature Effect For Growth Gallium and Tantalum Doped Ba0.5 Sr0.5TiO3Thin Film Irzaman Irzaman; H. Darmasetiawan; H. Hardhienata; M. Hikam; P. Arifin; S.N. Jusoh; S. Taking; Z. Jamal; M.A. Idris
Atom Indonesia Vol 35, No 1 (2009): January 2009
Publisher : PPIKSN-BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/aij.2009.48

Abstract

Thin films 10 % gallium oxide doped barium strontium titanate (BGST) and 10 % tantalum oxide doped barium strontium titanate (BTST) were prepared on p-type Si (100) substrates using chemical solution deposition (CSD) method with 1.00 M precursor. The films were deposited by spin coating method with spinning speed at 3000 rpm for 30 seconds. The post deposition annealing of the films were carried out in a furnace at 200oC, 240oC, 280oC (low temperature) for 1 hour in oxygen gas atmosphere. The surface roughness and grain size analysis of the grown thin films are described by atomic force microscope (AFM) method at 5000 nm x 5000 nm area. The rms surface roughness BGST thin films at 5000 nm x 5000 nm area are 0.632 nm, 0.564 nm, 0.487 nm for temperature 200oC, 240oC, 280oC, respectively, whereas the grain size (mean diameter) are 238.4 nm, 219.0 nm, 185.1 nm for temperature 200oC, 240oC, 280oC, respectively. In fact, to increase annealing temperature from 200oC to 280oC would result in decreasing the rms roughness and grain size. Therefore, rms roughness and grain size would have the strong correlation annealing temperature. Received: 9 November 2008; Revised: 24 August 2009; Accepted: 25 August 2009
Electrical Properties of Photodiode Ba0.25Sr0.75TiO3 (BST) Thin Film Doped with Ferric Oxide on p-type Si (100) Substrate using Chemical Solution Deposition Method Irzaman Irzaman; H. Syafutra; H. Darmasetiawan; H. Hardhienata; R. Erviansyah; F. Huriawati; Akhiruddin Akhiruddin; M. Hikam; P. Arifin
Atom Indonesia Vol 37, No 3 (2011): December 2011
Publisher : PPIKSN-BATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/aij.2011.81

Abstract

In this paper we have grown pure Ba0.25Sr0.75TiO3 (BST) and BST doped by Ferric Oxide Fe2O3 (BFST) with doping variations of 5%, 10%, and 15% above type-p Silicon (100) substrate using the chemical solution deposition (CSD) method with spin coating technique at rotation speed of 3000 rpm, for 30 seconds. BST thin film are made with a concentration of 1 M 2-methoxyethanol and annealing temperature of 850oC for the Si (100) substrate. Characterization of the thin film is performed for the electrical properties such as the current-voltage (I-V) curve using Keithley model 2400 as well as dielectric constant, time constant, pyroelectric characteristics, and depth measurement. The results show that the thin film depth increases if the concentration of the Ferric Oxide doping increases. The I-V characterization shows that the BST and BFST thin film has photodiode properties. The dielectric constant increases with the addition of doping. The maximum dielectric constant value is obtained for 15 % doping concentration namely 83.1 for pure BST and 6.89, 11.1, 41.63 and 83.1, respectively for the Ferric Oxide doping based BST with concentration of 5%, 10%, and 15%. XRD spectra of 15% of ferric oxide doped BST thin film tetragonal phase, we carried out the lattice constant were a = b = 4.203 Å; c = 4.214 Å; c/a ratio = 1.003. Received: 01 February 2010; Revised: 04 October 2011; Accepted: 02 November 2011
SIMULASI PERAMBATAN GELOMBANG ELEKTROMAGNETIK PADA KRISTAL FOTONIK 2D MENGGUNAKAN METODE FINITE DIFFERENCE FREQUENCY DOMAIN Adly Maulana Suherman; Teguh Puja Negara; Hendradi Hardhienata; Husin Alatas
KOMPUTASI Vol 16, No 2 (2019): Komputasi: Jurnal Ilmiah Ilmu Komputer dan Matematika
Publisher : Ilmu Komputer, FMIPA, Universitas Pakuan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (453.567 KB) | DOI: 10.33751/komputasi.v16i2.1619

Abstract

Numerical simulations on two-dimensional photonic crystals with defects were analyzed using the Finite Difference Frequency Domain (FDFD). This approach consists of Maxwell's formulation that uses Central Finite Difference to place fields and materials at discrete points of the Yee grid, so that the matrix wave equation is obtained in the form of column vectors. Absorbent boundary conditions use Perfectly Matched Layer (PML) with fictitious magnetic conductivity to shed incoming waves at the edge of the domain calculation. Photonic crystals can be assumed to be a periodic lattice of dielectric material that produces the phenomenon of photonic band gap (PBG). The results of FDFD simulations are compared with the literature with a difference of 0.056. This small difference value means that this method is good enough to analyze PBG phenomena. For point defects and the accumulation of electromagnetic waves, linear defects are investigated and analyzed with spectral responses. Insertion of defects in photonic crystals will produce a photonic pass band (PPB). The simulation results show that PPB depends on the angle of arrival vector, material permittivity, and width of the defect structure.
PENGEMBANGAN KIT PRAKTIKUM DIFRAKSI DAN INTERFERENSI CAHAYA UNTUK MENINGKATKAN PENGUASAAN KONSEP DAN KEMAMPUAN BERPIKIR KRITIS Asep Setiawan; Indarini Dwi Pursitasari; Hendardi Hardhienata
Edusentris Vol 5, No 1 (2018): Maret
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (479.507 KB) | DOI: 10.17509/edusentris.v5i1.289

Abstract

This study aims to develop diffraction and light interference practicum kits to improve the mastery of concepts and students' critical thinking skills. The research method begins with needs analysis, design, expert validation, testing to students, and application of practicum kits in learning. The instruments used were expert validation sheets, concept mastery tests and critical thinking skills, observation sheets of teacher and student activities, and student response questionnaires. The results of the study showed the validator's assessment for the content validity aspect and construct validity practicum kit was 91.3%. As well as the N-gain from the initial test and the final test mastery of the concept of 42% (sufficient category) and critical thinking ability by 45% (sufficient category). Inferential statistical test results show that there were significant differences between the initial test scores and the final test of mastery of concepts and critical thinking skills. This result was supported by student response questionnaire after learning with an assessment of 97.3%.
Analisa Sifat Mekanik pada Bahan Anti Peluru dari Adisi Berpenguat Serat Panjang Tandan Kosong Kelapa Sawit (TKKS) okta riza; Siti Nikmatin; Hendradi Hardhienata; Firda Aulya Syamani
Newton-Maxwell Journal of Physics Vol. 3 No. 1: April 2022
Publisher : UNIB Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (505.266 KB) | DOI: 10.33369/nmj.v3i1.17567

Abstract

Kelapa sawit merupakan salah satu hasil perkebunan di Indonesia yang perkembangannya meningkat setiap tahun. TKKS merupakan limbah dari pabrik sawit yang pemanfaatannya belum optimal sehingga akan menjadi limbah padat. Penggunaan serat TKKS pada biokomposit adalah upaya reduksi dan pemanfaatan limbah TKKS yang melimpah. Tujuan dari penelitian ini adalah untuk mendapatkan biokomposit dengan adisi serat panjang TKKS ter-modifikasi untuk aplikasi bahan anti peluru dan mengetahui sifat mekanisnya. Sifat mekanik pada biokomposit yang diperoleh pada penelitian ini memiliki sifat mekanik yang baik untuk aplikasi bahan anti peluru, dimana biokomposit tersebut lentur dan mampu meredam gaya dan energi yang diberikan oleh peluru. Sampel terbaik berada pada biokomposit yang mengandung konsentrasi serat sebesar 18% dengan polimer epoxy
Co-Authors Adly Maulana Suherman Akhiruddin Akhiruddin F. Huriawati Firda Aulya Syamani H. Darmasetiawan H. Darmasetiawan H. Syafutra Husin Alatas Indarini Dwi Pursitasari Irzaman, Irzaman M. Hikam M. Hikam M.A. Idris Negara, Teguh Puja okta riza P. Arifin P. Arifin R. Erviansyah S. Taking S.N. Jusoh Setiawan, Asep S Siti Nikmatin Z. Jamal