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All Journal Jurnal Ilmu Dasar Jurnal Materi dan Pembelajaran Fisika IPTEK The Journal for Technology and Science Communications in Science and Technology Prosiding University Research Colloquium Bulletin of Chemical Reaction Engineering & Catalysis
Budi Purnama
Universitas Sebelas Maret (UNS)
Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Mathematics Medicine & Pharmacology Physics

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PENGARUH JUMLAH MULTILAPISAN [NI80FE20/CU]N TERHADAP EFEK MAGNETOIMPEDANSI PADA KAWAT CU HASIL ELEKTRODEPOSISI Ismail, Ismail; Wicaksono, B. Anggit; Nuryani, Nuryani; Purnama, Budi
Jurnal Materi dan Pembelajaran Fisika Vol 5, No 2 (2015): Jurnal Materi dan Pembelajaran Fisika
Publisher : Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (427.297 KB)

Abstract

Efek magnetoimpedansi pada kawat tembaga yang dideposisi dengan lapisan Ni80Fe20/Cu telah berhasil diamati. Pengukuran dilakukan pada frekuensi rendah (20 ? 100 kHz) dengan variasi jumlah lapisan Ni80Fe20/Cu. Hasil pengukuran menunjukkan rasio magnetoimpedansi meningkat secara signifikan dari 6,4% menjadi 50% dengan peningkatan jumlah lapisan dari   N = 1 hingga N = 3. Hasil pengukuran juga menunjukkan sensitifitas terhadap medan juga meningkat 20 kali lipat dengan peningkatan jumlah lapisan Ni80Fe20/Cu.    
Sensitive Magnetic Field Sensor Based on Compensated Double Pick Up Coil Purnama, Budi; Suharyana, Suharyana; Sutomo, Artono Dwijo
IPTEK The Journal for Technology and Science Vol 23, No 1 (2012)
Publisher : IPTEK, LPPM, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20882033.v23i1.16

Abstract

Sensitive magnetic field sensor based on compensated double pick up coil has been developed. In order to confirm sensitifity of modified design, experiment carried out in two steps. Firstly, sensitify of conventional design is clarified. Here pick up coil as an active sensor and solenoid as an exitation coil is separately made. Secondly, modified sensor of integrated configuration is developed. Here for both active flux gate sensor and the exitation coil is made in same one core magnetic. Ferrite and standar foil soft magnetic is utilized in this experiment. In attention, frequency of 50 Hz is used for the whole experimens. A result showed that sensitvity of the integrated configuration sensor is much larger than conventional one. Then, power consume of the integrated flux gate sensor is much lower than conventional. Finally, a range measurement of the integrated configuration sensor can be realized less than 20 T which potential may perhaps sense a change of natural local magnetic field.
Demonstration of Magneto-Impedance Sensor on Multilayer Coil [Ni80Fe20/Cu]N Result of Electro-Deposition Nahrun, Ahmad Asrori; Wicaksono, B. Anggit; Ismail, Ismail; Nuryani, Nuryani; Purnama, Budi
Jurnal ILMU DASAR Vol 17 No 2 (2016)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (381.191 KB) | DOI: 10.19184/jid.v17i2.2688

Abstract

Demonstration performance magneto - impedance sensor on the coil wire multilayer [ Ni80Fe20/Cu ]N electro - deposition results presented in this paper . At first multilayer [ Ni80Fe20/Cu ]N deposited on a Cu wire into a coil and then the sample is modified by the number of windings 2 and 4. The results of impedance measurements under the influence of the magnetic field shows that the magneto - impedance ratio increases with the increase in the number of windings. Magneto - impedance ratio changed from 15 % to 17.4% with a change in the number of windings of 2 to 4. The fact these results allegedly contributed their self-inductance value of this magnitude greater contribution to the increase in the number of windings.Keywords: Magneto - impedance sensor, electro-deposition , multilayer coils [Ni80Fe20/Cu]N
Annealing temperature modify of crystalline structure, magnetic properties and antibacterial performance in nickel substituted cobalt ferrite nanoparticles utilizing natural-fine-sediment Bestari, Laksmita Farah; Iqlimatussholihah, Lathifah; Prasetya, Nurdiyantoro Putra; Kusumandari; Utari; Riyatun; Purnama, Budi
Communications in Science and Technology Vol 9 No 2 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.2.2024.1495

Abstract

This study details the nickel-substituted cobalt ferrite nanoparticle employing natural fine sediment (NiCFO-fs) annealing temperature dependency of crystalline and magnetic characteristics. The NiCFO-fs nanoparticles were prepared by the coprecipitation method with varying annealing temperatures (200-500°C with increment of 100°C for five hours). As a comparison, Ni-CFO was also synthesized using pure analytical chemicals (NiCFO-pa). The XRD results showed that the whole Ni-CFO nanoparticles established an inverse spinel face center cubic (fcc) order according to space group Fd-3m for both NiCFO-fs and NiCFO-pa. There was no additional peak, indicating that Ni2+ cations successfully substituted in cobalt ferrite nanoparticles. In case of NiCFO-fs nanoparticle samples, a crystallite size (D) decreased with the increasing annealing temperature (Ta), namely 45.72 nm, 37.35 nm, 25.95 nm, and 20.51 nm. In contrast to NiCFO-pa, the D increased with the increase of the Ta, i.e., 19.67 nm, 20.74 nm, 21.99 nm, and 23.33 nm. Meanwhile, FTIR results showed the presence of metal-oxygen bonds at 551-586 cm-1 and 384-391 cm-1 at tetrahedral (k1) and the octahedral (k2) sites for both NiCFO-fs and NiCFO-pa nanoparticles samples. The VSM result showed that a narrow hysteresis curve was observed for the NiCFO-fs sample compared to NiCFO-pa. The NiCFO-fs nanoparticles owing the smallest coercive field (HC) of 79.5 Oe were attained for the Ta of 300°C. In case of NiCFO-fs samples, magnetization saturation (MS) decreased with the increase of the Ta in contrast to NiCFO-pa samples. Here, the redistribution of two and three plus ions in the sub-lattice k1 and k2 locations should be encouraged by the Jahn-Teller phenomenon through strain-induced magnetism. The findings of the antibacterial test indicated that the potential of NiCFO based on natural materials (fine sediment) was higher than that of NiCFO based on pure analytical chemicals. This result was also supported by the emergence of ZOI magnitudes for all NiCFO-fs materials compared to NiCFO-pa that was only at Ta = 300°C.
Strategi Komunikasi Code Switching oleh Pembelajar Bahasa Inggris Fauziati, Endang; Purnama, Budi; Ovita, Lala Devi; Kusumaningsih, Cyntia Mahardhika
Prosiding University Research Colloquium Proceeding of The 11th University Research Colloquium 2020: Bidang Sains dan Teknologi
Publisher : Konsorsium Lembaga Penelitian dan Pengabdian kepada Masyarakat Perguruan Tinggi Muhammadiyah 'Aisyiyah (PTMA) Koordinator Wilayah Jawa Tengah - DIY

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Abstract

Penelitian ini bertujuan untuk mengkaji tipe-tipe dan realisasi penggunaan strategi komunikasi Code Switching yang digunakan oleh siswa Sekolah Menengah Pertama saat berkumunikasi dalam bahasa Inggris sebagai bahasa asing. Penelitian ini menggunakan pendekatan kualitatif. Subjek penelitian adalah 30 siswa SMP N IV Surakarta. Obyek penelitian adalah tipe-tipe dan realisasi penggunaan strategi komunikasi Code Switching yang digunakan siswa saat berkumunikasi dalam bahasa Inggris. Data dikumpulkan lewat sistim pancing, siswa diberi tugas untuk mendiskripsikan sebuah kartun; ujaran mereka di rekam dan dijadikan sebagai sumber data membuat karangan bebas dalam bahasa Inggris. Data dianalisis secara kualitatif dengan teknik induktif dengan memanfaatkan kerangka analisis Dornyei dan Myers-scotton. Temuan penelitian diinterpretasikan dengan menggunakan teori yang relevan. Hasil penelitian menunjukkan bahwa pembelajar menggunakan tiga macam alih kode, yaitu: alih kode tag, alih kode intra sentential, dan alih kode inter-sentential. Dan ada tiga faktor yang berkontribusi terhadap penggunaan alih kode ini, yaitu penguasaan dua bahasa atau bilingual, keterbatasan penguasaan bahasa Inggris, dan sebagai strategi kompensasi. Dapat disimpulkan bahwa penggunaan alih kode oleh pembelajar Bahasa Inggris sebagai bahasa asing merupakan hal yang wajar dan tak terhindakan. Karena alih kode merupakan salah satu strategi komunikasi untuk mengkompensasi keterbatasan penguasaan kebahasaan bahasa sasaran.
Lanthanum-substituted Cobalt Ferrite Established by the Co-precipitation Process: Annealing Temperature Adjustment of Structural, Magnetic, and Dye Removal Characteristics Rahmawati, Ramadona; Musadewi, Adiana; Prasetya, Nurdiyantoro Putra; Suharno, Suharno; Budiawanti, Sri; Rahardjo, Dwi Teguh; Riyatun, Riyatun; Utari, Utari; Iriani, Yofentina; Nuryani, Nuryani; Purnama, Budi
Bulletin of Chemical Reaction Engineering & Catalysis 2023: BCREC Volume 18 Issue 4 Year 2023 (December 2023)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.19638

Abstract

Co-precipitation process was used for the synthesis of lanthanum-substituted cobalt ferrite nanoparticles at several annealing temperatures (Ta), i.e., 200 °C, 300 °C, and 400 °C, for 5 h. XRD spectral depicted that the produced nanoparticles sample indicates a single phase of fcc inverse spinel conforming to ICDD No 22-1086. The crystallite size (D) calculation at the strongest peaks shows the increase in enhancing the Ta i.e., 18.99 nm, 19.90 nm, and 23.21 nm for 200 °C, 300 °C, and 400 °C, respectively. The FTIR results showed absorption band at the tetrahedral site, v1 ~575 cm−1 and the octahedral site, v2 ~474 cm−1. The absorption bands indicate that the lanthanum ions have successfully replaced the Fe3+ cations in the original cobalt ferrite structure. According to the hysteresis loop, the coercive field's (HC) magnitude falls from 700 Oe down to 550 Oe as Ta increases. This result is consistent with the anisotropy constant which decreased from 0.77×104 erg/cm3 to 0.56×104 erg/cm3. The obtained nanoparticles also showed superior performance (much larger than 95%) for dye removal of Congo red. Copyright © 2023 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Co-Authors Ahmad Asrori Nahrun, Ahmad Asrori Artono Dwijo Sutomo B. Anggit Wicaksono, B. Anggit Bestari, Laksmita Farah Dwi Teguh Rahardjo Endang Fauziati Iqlimatussholihah, Lathifah Ismail Ismail Kusumandari Kusumaningsih, Cyntia Mahardhika Musadewi, Adiana Nuryani Nuryani Ovita, Lala Devi Prasetya, Nurdiyantoro Putra Rahmawati, Ramadona Riyatun Riyatun, Riyatun Sri Budiawanti Suharno Suharno Suharyana Suharyana Utari Utari Utari Yofentina Iriani Yundari, Yundari