Sökning: "Ferroelectric thin films"

Visar resultat 1 - 5 av 30 avhandlingar innehållade orden Ferroelectric thin films.

  1. 1. Ferroelectric Thin Films on Si-substrate for Tunable Microwave Applications

    Författare :Saeed Abadei; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Phase shifter; BaxSr1-xTiO3; Tunable microwave device; Ferroelectric Varactor; Paraelectric; Filter; Na0.5K0.5NbO3; Integrated ferroelectric device; SrTiO3; Ferroelectric;

    Sammanfattning : The thesis presents the development of microwave tunable devices based onferroelectric thin films. The main tasks in this work are the fabrication, optimization, andintegration of ferroelectric thin film into Si-MMIC. LÄS MER

  3. 2. Ferroelectric Na0.5K0.5NbO3 Thin Films : Processing, Physical Properties and Applications

    Författare :Choong-Rae Cho; KTH; []
    Nyckelord :Ferroelectric thin film; Pulsed Laser Deposition;

    Sammanfattning : This thesis presents the results on the fabrication offerroelectric Na0.5K0.5NbO3(NKN) thin films by pulsed laser deposition (PLD)technique, comprehensive characterization of film properties,and various applications of NKN films. LÄS MER

  4. 3. Processing and Properties of Ferroelectric Ag(Ta,Nb)O3 Thin Films

    Författare :Jung-Hyuk Koh; KTH; []
    Nyckelord :Ferroelectric; Thin Film; PLD; Tunable device;

    Sammanfattning : High tunability and low loss tangent of ferroelectric thinfilms offer unique opportunity for the development of variousmicrowave devices. Silver tantalate niobate, which showsexcellent microwave properties, was selected for this study. LÄS MER

  5. 4. Colloidal synthesis of metal oxide nanocrystals and thin films

    Författare :Fredrik Söderlind; Per-Olov Käll; Kajsa Uvdal; Mats Johnsson; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; nanoparticles; synthesis; contrast agents; functionalization; thin films; Chemistry; Kemi;

    Sammanfattning : A main driving force behind the recent years’ immense interest in nanoscience and nanotechnology is the possibility of achieving new material properties and functionalities within, e.g., material physics, biomedicine, sensor technology, chemical catalysis, energy storing systems, and so on. LÄS MER

  7. 5. Characterization of (Ba,Sr)TiO3 thin films for multiplier applications

    Författare :Pär Rundqvist; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; BSTO; THz; triplers; powerhandling capability; multilayer structures; frequency multipliers; Ferroelectric; BST; losses; Varactor; STO;

    Sammanfattning : (Ba,Sr)TiO3 (BSTO) and SrTiO3 (STO) parallel plate ferroelectric varactors are investigated for microwave multiplier applications.STO and BSTO exhibit low losses, high permittivity and largetunability of both permittivity and losses. All films are deposited using Pulsed Laser Deposition, magnetron sputtering and E-beam evaporation. LÄS MER