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Journal : Komunikasi Fisika Indonesia

PERHITUNGAN INTERAKSI ANTAR NANOPARTIKEL MAGNETIK DAN MAGNETISASI DALAM LAPISAN TIPIS COBALT SAMARIUM MENGGUNAKAN SOFTWARE MATLAB R2015a

Komunikasi Fisika Indonesia Vol 14, No 2 (2017)
Publisher : Universitas Riau

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Abstract

The calculation of magnetic nanoparticles interaction and magnetization in thin film ofsamarium-cobalt using MATLAB R2015a Software has been performed. The computerconsisted of two program that is program menu and main program. The data entered in theprogram menu are DCD and IRM magnetization values obtained from measurements usingalternating gradient force magnetometer (AGFM). The next step, the main program willcalculate magnetic nanoparticles interaction and magnetization and displays the results ingraphical form. Samarium composition was varied from 10%, 13%, 16%, 22%, 35% and40%. The results show the interaction is positive in the sample, except for samarium 16% ofthe value of a negative interaction (-0.4 Arb.Unit), meaning that from the nature of dipolarinteractions. Sample magnetization value decreases linearly from the composition of 10% to40%, ie 1085,33 emu/cm3 to 226,23 emu/cm3, while the value of coercivity rises with theaddition of samarium composition up to 16%, and maximum values contained in thecomposition of 16%, ie 2052.17 Oersted. Adding of SmCo reaction above 16 at % Smproduced small value of coercivity of the films.

PENENTUAN TINGKAT KEMAGNETAN DAN INDUKSI MAGNETIK TOTAL ENDAPAN PASIR LAUT PANTAI PADANG SEBAGAI FUNGSI KEDALAMAN

Komunikasi Fisika Indonesia Vol 14, No 1 (2017)
Publisher : Universitas Riau

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Abstract

We report the determination of the stage of magnetism and magnetic induction iron sand deposits as afunction of depth in Padang, West Sumatra coast. Samples of the iron sand deposits are dried first,then the separation concentrate iron sand with sand using iron sand separator apparatus to identify theelement countain of sampels then it was used XRF ( X- Ray Fluerensence). The study resultsexpressed that grades stage magnetism iron sand deposits increases or increases as a function ofdepth, where the value of stage magnetism obtained by the ratio between the mass of the sample massconcentratet. The value of magnetic induction total measured using a magnetic sensor Pasco PS-2162through a solenoid made of 2500 loops with a length of 8 cm and a diameter of 2,5 cm wereelectrified by the variation of a current of 2 A to 10 A and a horizontal distance of 1 to 5 mm alongthe axis solenoid. When an electric current is increased, the greater the total magnetic induction, andthe total value of magnetic induction decreases as a function of the horizontal distance.

PENGUKURAN INDUKSI MAGNETIK TOTAL DAN IDENTIFIKASI KANDUNGAN ELEMEN ENDAPAN PASIR BESI DI PANTAI BAGIAN SELATAN KOTA PADANG SUMATERA BARAT

Komunikasi Fisika Indonesia Vol 14, No 1 (2017)
Publisher : Universitas Riau

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Abstract

The measurement of total magnetic induction and identification of elements of iron oxideparticles (consentrate) from Southern Padang City West Sumatera has been done. Thesample was dried under sun ray prior to iron sand separator. X-Ray Fluorescence (XRF) wasused to identify the elements of iron sand only from Bungus and Carolina beach, before andafter iron sand separator process. Total magnetic induction of the sample and solenoid wasmeasured by Pasco magnetic probe 2162. The solenoid was designed for 2500 wonds and 8cm long and diametre of 3 cm. The electric current was applied to the solenoid with the valueof 2-10 A. The total magnetic induction was measured in the direction of horizontal distance,namely 1-5 mm from the edge of the solenoid. The total magnetic induction values increasewhen the electric current increased and decreased when the horizontal distance is increased.

VISUALISASI POTENSIAL LISTRIK DI ANTARA DUA PLAT SEJAJAR BERHINGGA DENGAN PROGRAM KOMPUTER BERBASIS MATLAB

Komunikasi Fisika Indonesia Vol 15, No 1 (2018)
Publisher : Universitas Riau

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Abstract

The calculation of electric potential between two parallel plates with finite size is difficult work, visualization of the issue comprehensively is needed. In this paper, visualization of electric potential between two parallel plates with finite size has been done by developing a MATLAB based computer program. The electric potential was calculated by solving two dimensional Laplace equation. There are two parts of the program that have been developed, the menu program and the main program. The menu program was provided to store the input data required in the calculation. While, the main program served toperform calculations and visualization of the electric potential. The visualization of the electric potential was shown in the mesh and contour graph. The results showed that the program is applicable for various sizes of plates, and the electric potential in each position can be calculated and visualized. However, the computer programs has some limitations, such as for perfoming calculations of electric potential. For plate width ( ) of  m, distance of plates ( ) of  m, and initial potential ( )of  Volt, the electric potential in coordinate (20,0.5) is not defined (NaN).

PREPARASI PARTIKEL MAGNETIK DARI PASIR BESI PANTAI BATANG KAPAS SUMATERA BARAT MENGGUNAKAN METODE BALL MILLING

Komunikasi Fisika Indonesia Vol 15, No 2 (2018)
Publisher : Universitas Riau

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Abstract

Preparation of micro magnetic particle and its magnetic propertis from iron sand beach of Batang Kapas west Sumatera using Ball Milling method has been done. Prior to the Ball Milling process, the samples were processed by iron sand separator (ISS) in order to separate between magnetic particles and non magnetic one. Next, the concentrates from ISS were crushed by Ball Milling method  as a function of time namely 20, 40, and 60 hours. For separation between magnetic particles and non magnetic one, then NdFeB magnet was utilized. The results showed that the magnetic degree of the sample is about 0,5%. Measurements of magnetic induction solenoids were carried out using a Magnetic Probe Pasco PS -2162 as a function of current (2, 4, 6, 8 and 10) A and a  functions of distance (1, 2, 3, 4, and 5) mm. Then the total magnetic induction of the solenoid (solenoid with sample core and concentrate) was measured as a function of an electric current for a fixed distance of 1 mm. The calculation results showed that magnetic susceptibility and mass susceptibility increase with Ball Milling time from (3376,400-7765,130). This value is within the interval of 46-80000 which is the interval of Ilmenite mineral (FeTiO3; Antiferromagnetik). The increase in magnetic susceptibility and mass susceptibility of samples processed by Ball Milling is thought to be due to the increasing number of magnetic particles in the sample.

PENENTUAN SIFAT MAGNETIK PASIR DAN DEBU SEPANJANG JALAN KARTAMA KOTA PEKANBARU MENGGUNAKAN MAGNETIC PROBE PASCO PS-2162

Komunikasi Fisika Indonesia Vol 16, No 1 (2019)
Publisher : Universitas Riau

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Abstract

Topsoil is the recipient of various kinds pollutants, especially heavy metals. Heavy metals have been detected in sand and dust along the highway. Measuring the magnetic properties of road sediment along Kartama road in Pekanbaru City has been done. The magnetic properties measured are magnetic degree, magnetic and mass susceptibility using magnetic induction measurement.  The Samples were taken at sixteen locations with the amount of 1 or 2 kg for each point location, the samples were named as samples 16, 7a7e, 8a8e. The magnetic particles of the samples were separated from sand and dust using Iron Sand Separator and later using Neodymium Iron Boron (NdFeB) magnet. The total magnetic induction of the samples and concentrates were measured using Pasco Magnetic Probe PS-2162. In order to measure the magnetic induction of the samples, a solenoid of 3 cm in diameter, length of 10 cm and 2000 of windings was made. The empty solenoid magnetic induction was measured as a function of applied current ranging from 210 A and as a function of horizontal distance of 15 mm from the the solenoid ends. Total magnetic induction (samples and concentrates) was measured for the applied currents of 6 A. The results showed that the highest magnetic degree obtained from the sample number 7e that is 2.54% and the lowest level obtained from the sample number 3 that is 0.17%. The highest magnetic susceptibility value obtained from the sample number 7b was is 9158.12 , and the lowest magnetic susceptibility value obtained from the sample number 2 with the value of 3125.52 . Based on the mass susceptibility values of the concentrate obtained that the sand and dust along the road Kartama Pekanbaru which are in the interval 4.6 to 8.0, they implies that the mass susceptibility of the samples is in the range of Ilmenite phase FeTiO3or antiferromagnetic. 

Co-Authors . Amiruddin . Rusli A. A. R, Muhammad Taufik Abdul Rahim Abdul Rohman Afif Bintoro Agung, Putra Sunan Ahmad Fali Oklilas Ahmad Heryanto, Ahmad Ahmad Siswantara, Ahmad Ajib Susanto Al Azhar Alexander A. S. Gunawan, Alexander A. S. Alexander Richard, Alexander Alfian Noor Alimuddin Alimuddin Aman Sentosa Panggabean Amiruddin Amiruddin An Nisa, Redda Andayani, Ratih Diah Anderes Gui, Anderes Andy Andy Antonius Surbakti Antoro, Marwin Didik Ariusmedi, Ariusmedi Arman Sayuti Arneliwati, Arneliwati Arsindho, Yoarga Asdi Agustar Asmayanti, Andi Nur Atmoko, Doni Prio Azhari Azhari Badillah, Clara Fin Bayhakki Bayhakki, Bayhakki budianto panjaitan Bukhory, M Ilham Al Daniel Daniel Day, Diasttri Wahyu Rahmah DENI NOVIANA Deris Stiawan Desvita, Yenny Dewi Fatma Dewi, Tri Isyani Tungga Dian Masyitha Effendi Effendi Eka Srimulyati, Eka Eko Harry Susanto Elsavira, Radhika Erina Erina Erlina, Junia Etriwati, . Eva Marliana, Eva Eviliony, Eviliony Fadillah Irwansyah, Fadillah Fathra Annis Nauli Fauzi, Maulidya Hafsari febriyanti, eka Firman, H Fitri, Yanuari Eka Florensa Rosani Purba Frastantie, Dilla Frengky, Frengky Gaanty Pragas Maniam, Gaanty Pragas Gunanti Gunanti, Gunanti Gunawan Wibisono Hamdan Hamdan Hamdan, Suhaivi Hamdani Hamdani Harison, Alya Nathasya Hariyani, Fifi Hasneli, Yesi Henri D. Henri, Henri D. Hidayat Asta, Hidayat Hidayat Hidayat Hutabarat, Utami Maulina Hutagalung, Sandi Christopher Ibnu Utomo Ichsan, Tahayati Imam Imam Irawan W Kusuma, Irawan W Isna’im, Isna’im Jendrius Jendrius Jimmy G. Jimmy, Jimmy G. Jumaini, Jumaini Khoiri, Kms. M. Shofuan Kiyatmoko, Tomi Konadi, Alfian Krisman Krisman, Krisman Kurniawan, Rizal Eko Kusuma, Afif Yuda Kusuma, Irawan W. Laili, Miftachul Larasati, Indah Kurnia Laraswati, Yeni Lavintang, Mutiara Lazuardi, Auzan Leo Satya Phangestu, Leo Satya Ligaya Ita Tumbelaka Maharani, Anizza Dyah Kartika Mardiana Mardiana Marinda, Hening Ayu Maulia, Rahmi Maulizar, Ria Mokhamad Fakhrul Ulum Monita Olivia morow, meutya silviana Muhammad Fachrurrozi Muhammad Fajri Muhammad Syaipul Hayat Mulyadi Adam, Mulyadi Mustafa Sabri Muttaqien Muttaqien, Muttaqien Nainggolan, Maria Sonya Nauli Nastiti, Mahardika Niniarty Z. Djamal, Niniarty Z. Nirwana, Nirwana Noor Hindryawati, Noor Nora Vera Amanda, Nora Vera Noviyanti, Dea Sella Nunuk Hariani Soekamto Nuraedah Nuraedah Nurchayati, Sofiana Nurjanah, Laras Azrisa Nurul Huda Nuzul Asmilia Pasuluran, Nirwanto Permana, I Pratiwi, Noviara Sindi Prima, Benny Putra, I Gusti Agung Ngurah Arphan Eka Putra, Sandra Utama Putri, Arum Cantika RAHMAT GUNAWAN Rahmawati Rahmawati Ramadhana, Cut Erika Ramalis, T R Ramandhan, Akbar Ramandhan, Akbar Ramandhan Reza Firsandaya Malik Rilla Gantino Rinidar Rinidar, Rinidar Riri Novayelinda Robert Faber Rosmiati Rosmiati Rossi Passarella rusita rusita Rusli Rusli Rustaman, N Y Safitroh, MHD. Ali Saktioto Saktioto, Saktioto Salomo, Salomo salomo, Salomo Saparudin Saparudin Sari, Reny Pamela Sariningrum, Arlita Sarmayanta Sembiring Satria, Neti Sella, Nur Sembiring, Anatasya Sikumbang, Dinda Jasmal Sinta, Dwi Siti Anisatur Rofiqah, Siti Anisatur Siti Rahmalia Sitra, Elian Sofyan, Suhikma Sri Angky Soekanto Sri Maryani Sudirman Sudirman Sugandi Yahdin Sugito Sugito Suib Awrus Sunit Hendrana Susanto, Ari Murti Susilawati, Tri Susita, Farida Sutarno Sutarno Syafitri, Syafitri Syafruddin Syafruddin Syahadat, Rachmat Syakbaniah Syakbaniah, Syakbaniah Syarief, Firman T Armansyah, T tasmi, cut nila Tasruddin Tasruddin, Tasruddin Teuku Reza Ferasyi Thoha Firdaus, Thoha Tjodi Harlim Tresna Soemardi, Tresna Triva Murtina Lubis Ulfa, Ruvida Umbu, Dany Usman Malik Utami, Ghiena Rifka Utari, Heta Vivi Oktaviani Wahdana Kusuma Sari, Wahdana Kusuma Wahid Gunarto, Wahid Wasisto Utomo Widodo Budiharto Widya Sari Wijanarto Wijanarto Winni Astuti, Winni Wisdiarman, Wisdiarman Woferst, Rismadefi Wolfgang Straka Wong Foek Tjong Wongso, Calista Wulandari Saputri, Wulandari Yanuar Yanuar, Yanuar Yulia Irvani Dewi YUNALDI, HEFRI Yurika, Yurika Yusmeri, Yusmeri Zoelkaranain, M Dicky Zuhendri, Zuhendri Zulfan Saam Zulkarnaen Zulkarnaen Zulnuraini, Zulnuraini Zuraidawati Zuraidawati, Zuraidawati