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Abstrak :
Telah dilakukan penelitian terhadap bahan ZnO dengan doping Litium dan Nikel menggunakan metode Sol-Gel. Prekusor yang digunakan adalah Zinc Acetate dengan 2-Propanol sebagai bahan bakar. Nikel acetate dan Litium acetate digunakan sebagai bahan dopan. Temperatur proses sol-gel dijaga tetap 70-80oC. Proses kalsinasi dilakukan pada temperatur 300oC selama 2 jam. Sedangkan proses sintering dilakukan pada temperatur 600oC selama 4 jam. Material ZnO dan ZnO dengan doping Litium menghasilkan fasa tunggal, sedangkan ZnO dengan doping Nikel menghasilkan fasa lain yaitu NiO. Semua material yang dihasilkan meiliki sifat ferroelektrik. Kurva P-E hysterisis menunjukkan bahwa ZnO memiliki polarisasi remanen 0.032 ?C/cm2dan medan koersivitas listrik 0.88 kV/cm. ZnO doping Litium dengan berbagai konsentrasi terjadi peningkatan nilai polarisasi remanen dan penurunan medan koersivitas listrik. ZnO doping Nikel dengan konsentrasi at 1 dan 3 terjadi kenaikan remanen dan penurunan medan koersivitas namun pada ZnO doping Nikel dengan konsentrasi at 6 nilai polarisasi remanen menurun dan nilai koersifitas meningkat. Pada ZnO doping Nikel dan Litium dengan konsentrasi yang sama mengalami kenaikan remanen dan penurunan koersifitas, sedangkan pada ZnO doping Nikel dan Litium dengan konsentrasi berbeda mengalami penurunan remanen dan koersifitas meningkat dibandingkan dengan didoping dengan satu pendopingan.

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Synthesis Li Ni co doped ZnO have been done with Sol Gel method. Zinc Acetate used as percussors materials and 2 propanol as fuel. Nickel Acetate and Lithium acetate used as dopant. Temperature Sol Gel process has been maintained between 60 80oC. The calcination process was performed at temperature 300oC for 2 hours and sintering process was performed at 600oC for 4 hours. The resulting materials ZnO and Li doped ZnO result single phase materials, but Ni doped ZnO has secondary phase NiO. All Synthesis materials has ferroelectric properties. P E loop hysteresis shows that ZnO have remnant polarization of 0.032 C cm2 and coercive field of 0.88 kV cm. Li doped ZnO showed an increase in the polarization remnant and a decrease in the coercive field. Ni doped ZnO on 1 at 3 at concentration showed an increase in the polarization remnant and decerease in the coercive field, howerver 6 at Ni doped ZnO showed an decrease in the polarization remnant and a increase in the coercive field. Li, Ni co doped ZnO with same concentration showed an increase in the polarization remnant and decerease in the coercive field, however Li, Ni co doped ZnO with different concentration showed a decreased in the polarization remnant and increaed in the coercive field compared by single doped ZnO.

Abstrak :
Pada penelitain kali ini telah dirancang sebuah rangkaian Sawyer-Tower untuk bahan ferroelektrik dengan rangkaian kompensasi dan menggunakan tegangan tingi. Sistem yang digunakan terdiri dari Function Generator dengan output gelombang segitiga, Power Amplifier, Transformator tegangan tinggi (5000V),Frekuensi Counter, dan rangkaian Sawyer Tower yang memiliki rangkaian kompensasi sederhana serta pemrograman dengan meggunakan National Instrumen LabView 2010 yang akan menampilkan grafik histerisis dari bahan ferroelektrik. Dengan sistem ini telah berhasil memeperoleh PE loop dan penyimpanan data dalam bentuk ms.exel

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In this instrumentation research it has been designed a Sawyer-Tower circuit for ferroelectric materials by using a voltage compensation circuit and high voltage. The system used consists of a function generator to provide a triangle wave output, power amplifier, high voltage transformer (5000V), frequency counter, and Sawyer-Tower circuit which has a simple compensation circuit and programming utilized the National Instruments LabVIEW 2010. The result of the program is the showcase hysteresis of ferroelectric materials . This system has been managed to obtain the P-E loop and data storage in the form of .xls, .txt, .word

Abstrak :
The book deals with perovskite-type ferroelectric solid solutions for modern materials science and applications, solving problems of complicated heterophase/domain structures near the morphotropic phase boundary and applications to various systems with morphotropic phases. In this book domain state–interface diagrams are presented for the interpretation of heterophase states in perovskite-type ferroelectric solid solutions. It allows to describe the stress relief in the presence of polydomain phases, the behavior of unit-cell parameters of coexisting phases and the effect of external electric fields. The novelty of the book consists in (i) the first systematization of data about heterophase states and their evolution in ferroelectric solid solutions (ii) the general interpretation of heterophase and domain structures at changing temperature, composition or electric field (iii) the complete analysis of interconnection domain structures, unit-cell parameters changes, heterophase structures and stress relief.

Abstrak :
Penelitian ini bertujuan untuk mensintesa dan mengoptimasi thick film BaFe₁₂O₁₉ fasa tunggal, thick film BaTiO₃ fasa tunggal dan material multilayer BaTiO₃/ BaFe₁₂O₁₉ dengan metode Sol-Gel/Spin Coating. Karakterisasi dilakukan untuk mengetahui sifat ferromagnetik dan ferroelektrik.  Deposisi material multilayer dilakukan pada substrat single crystal Si (100) menggunakan spin coater. Thick film BaFe₁₂O₁₉ fasa tunggal berhasil disintesa dengan parameter optimum jumlah lapisan 9 lapis,  kecepatan putaran 3000 rpm, temperature annealing 1000⁰C selama 3 jam, dan rasio molar Ba: Fe = 1 : 8. Hasil karakterisasi SEM menunjukkan bahwa material multilayer BaFe₁₂O₁₉ memiliki distribusi ukuran dan bentuk partikel yang  homogen, dengan ukuran partikel berkisar antara 100-150 nm dan tebal sekitar 2,9 µm. Hasil uji VSM pada material multilayer BaFe₁₂O₁₉ menunjukkan nilai koersivitas  pada arah parallel dan perpendicular yang hampir sama yaitu 2,5 kOe. Thick film BaTiO₃ fasa tunggal berhasil dideposisikan dengan kondisi proses optimum yaitu, temperatur annealing 800⁰C selama 4 jam dan kecepatan putaran 4000 rpm.  Film BaTiO₃ dengan jumlah lapisan 5 lapis mempunyai ketebalan 2,6-3,2 µm. Material multilayer BaTiO₃/ BaFe₁₂O₁₉ berhasil dideposisikan pada substrat Si dengan metode sol-gel/spin coating serta menunjukkan sifat ferromagnetik dan ferroelektrik. Nilai magnetik Saturasi, Remanen, dan medan koersif pada material multilayer BaTiO₃/ BaFe₁₂O₁₉ yaitu 2,7 memu, 1,3 memu dan 1,7 kOe. Sedangkan kurva histerisis elektrik menunjukkan nilai polarisasi spontan (P_s), polarisasi remanen (P_r) dan medan Coersive (E_c)  berturut-turut 5,4 mC/cm², 6,2 mC/cm² dan 1 kV/cm.

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In this research, single phase thick film BaFe₁₂O₁₉, BaTiO₃ and BaTiO₃/ BaFe₁₂O₁₉ multilayer had been synthesized by sol gel/spin coating method. Ferroelectric and ferromagnetic properties were observed. Multilayer materials was deposited on single crystal substrate Si (100) using a spin coater. Single phase thick film BaFe₁₂O₁₉  was synthesized with optimum parameters of  9 layers, 3000 rpm rotation speed, 1000⁰C annealing temperature for 3 hours, and molar ratio Ba:Fe = 1: 8. The characteristic SEM images indicate that the multilayer BaFe₁₂O₁₉ material has a homogeneous size and shape distribution of particles, with crystallite size 100-150 nm. The magnetic hysteresis loops for single phase thick film BaFe₁₂O₁₉ showed that perpendicular and in-plane coercivity had the same value of 2,5 kOe. Single phase thick film BaTiO₃ was successfully deposited with optimum process conditions which were annealing temperature at  800⁰C for 4 hours and rotation speed 4000 rpm. The BaTiO₃ film with 5 layers has a thickness of  2.6-3.2 µm. BaTiO₃/ BaFe₁₂O₁₉ multilayer material was successfully deposited on the Si substrate with the sol-gel/spin coating method and showed ferromagnetic and ferroelectric properties. The saturation magnetization (Ms), remanent magnetization (Mr), and coercivity of BaTiO₃/ BaFe₁₂O₁₉ multilayer material are 2.7 memu, 1.3 memu and 1.7 kOe. From ferroelectric hysteresis loop it can be inferred that the values of remanent polarization (Pr), spontaneous polarization (Ps) and coercive field (Ec) are ,4 mC/cm², 6.2 mC/cm² and 1kV/cm, respectively.