Imperial College London
Alternate

DrPeterPetrov

Faculty of Engineering, Department of Materials

Principal Research Scientist
 
 
 
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Contact

 

+44 (0)20 7594 8156p.petrov

 
 
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Location

 

2.03DRoyal School of MinesSouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

129 results found

Yamada T, Petzelt J, Tagantsev AK, Denisov S, Noujni D, Petrov PK, Mackova A, Fujito K, Kiguchi T, Shinozaki K, Mizutani N, Sherman VO, Muralt P, Setter Net al., 2006, In-plane and out-of-plane ferroelectric instabilities in epitaxial SrTiO<sub>3</sub> films, PHYSICAL REVIEW LETTERS, Vol: 96, ISSN: 0031-9007

Journal article

Alford N, Petrov P, Salinas E, Dimitriou S, Hilton Ret al., 2006, Transforming electronics, MATERIALS WORLD, Vol: 14, Pages: 18-19, ISSN: 0967-8638

Journal article

Petrov PK, Palkar VR, Alford NMN, Tagantsev AK, Prashanthi K, Chien HI, Axelsson AK, Bhattacharya Set al., 2006, Microwave responce from La- and Dy- doped BiFeO<inf>3</inf> thin films, Pages: 28-33, ISSN: 0272-9172

The dielectric response of La- and Dy- doped BiFeO3 thin films to electric- and magnetic fields was measured at microwave frequencies (up to 12GHz) in a temperature range from 25°C to 300°C. Interesting phenomena were observed. Significant oscillations in the C(f) characteristic which were unaffected by the electric field or by elevated temperature but which were dampened by a magnetic field. We also observed 'N'-type I-V characteristics. A possible explanation for this mesoscopic response is the presence of structural features that cause resonance (e.g. grains, grain-boundaries, domains, domain walls etc), with a contribution strong enough to be averaged by the system. The exact origin of these features is unknown at present. © 2007 Materials Research Society.

Conference paper

Petrov PK, Alford NM, 2005, Improved SrTiO<sub>3</sub> thin films using oxygen relaxation technique -: art. no. 222902, APPLIED PHYSICS LETTERS, Vol: 87, ISSN: 0003-6951

Journal article

Alford NM, Petrov PK, Gagarin AG, Kozyrev AB, Sokolov AI, Soldatenkov OI, Volpyas VAet al., 2005, Enhanced electrical properties of ferroelectric thin films by ultraviolet radiation, APPLIED PHYSICS LETTERS, Vol: 87, ISSN: 0003-6951

Journal article

Petrov PK, Alford NMN, Gevorgyan S, 2005, Techniques for microwave measurements of ferroelectric thin films and their associated error and limitations, MEASUREMENT SCIENCE AND TECHNOLOGY, Vol: 16, Pages: 583-589, ISSN: 0957-0233

Journal article

Alford NM, Buslov O, Keis V, Kotelnikov I, Kozyrev A, Kulik P, Petrov PKet al., 2005, Tunable 4-pole piezoelectric filter based on two dielectric resonators, INTEGRATED FERROELECTRICS, Vol: 77, Pages: 123-128, ISSN: 1058-4587

Journal article

Walters RA, Centeno A, Petrov PK, McN Alford Net al., 2005, Tuneable end-coupled ferroelectric-gap filters based on barium strontium titanate capacitors, Asia-Pacific Conference on Applied Electromagnetics (APACE 2005), Publisher: IEEE, Pages: 250-252

Conference paper

Petrov PK, Sarma K, Alford NM, 2004, Evaluation of residual stress in thin ferroelectric films using grazing incident X-ray diffraction, 10th European Meeting on Ferroelectricity, Publisher: TAYLOR & FRANCIS LTD, Pages: 183-189, ISSN: 1058-4587

Conference paper

Petrov PK, Alford NM, Buslov O, Keis V, Kotelnikov I, Kulik P, Kozyrev Aet al., 2004, Tuneable two-pole one-dielectric-resonator filter with elliptic characteristics, 16th International Symposium on Integrated Ferroelectrics/5th Korean Workshop on High Dielectric Devices and Materials, Publisher: TAYLOR & FRANCIS LTD, Pages: 261-+, ISSN: 1058-4587

Conference paper

Sarma K, Petrov PK, Alford NM, 2004, Single- and multi-target pulsed laser deposition of thin BSTO films: Preparation, microstructure and electrical properties, Symposium on Ferroelectric Thin Films XII held at the 2003 MRS Fall Meeting, Publisher: MATERIALS RESEARCH SOCIETY, Pages: 369-374, ISSN: 0272-9172

Conference paper

Buslov OY, Keys VN, Kozyrev AB, Kotelnikov IV, Kulik PV, Alford NM, Petrov PKet al., 2004, Tuneable piezoelectric filter based on a dual-mode dielectric resonator, 14th International Crimean Conference on Microwave and Telecommunication Technology, Publisher: WEBER PUBLISHING CO, Pages: 410-411

Conference paper

Astafiev KF, Sherman VO, Cantoni M, Tagantsev AK, Setter N, Petrov PK, Kaydanova T, Ginley DSet al., 2004, In-plane ferroelectricity in strontium titanate thin films, Symposium on Materials, Integration and Packaging Issues for High-Frequency Devices held at the 2003 MRS Fall Meeting, Publisher: MATERIALS RESEARCH SOCIETY, Pages: 109-114, ISSN: 0272-9172

Conference paper

Petrov PK, 2004, Microwave measurements of ferroelectric thin films: techniques, error and limitations, Symposium on Ferroelectric Thin Films XII held at the 2003 MRS Fall Meeting, Publisher: MATERIALS RESEARCH SOCIETY, Pages: 307-312, ISSN: 0272-9172

Conference paper

Sarma K, Farooq R, Jarman K, Pullar RC, Petrov PK, Alford NMet al., 2004, Sintering behaviour of Ba<sub>x</sub>Sr<sub>1-x</sub>TiO<sub>3</sub>, 10th European Meeting on Ferroelectricity, Publisher: TAYLOR & FRANCIS LTD, Pages: 249-252, ISSN: 1058-4587

Conference paper

Petrov PK, Alford NM, Astafiev KF, Tagantsev AK, Setter N, Kaydanova T, Ginley DSet al., 2003, Structural investigation of thin SrTiO<sub>3</sub> films grown on MgO and LaAlO<sub>3</sub> substrates, 15th International Symposium on Integrated Ferroelectrics, Publisher: TAYLOR & FRANCIS LTD, Pages: 465-473, ISSN: 1058-4587

Conference paper

Astafiev K, Sherman V, Tagantsev A, Setter N, Petrov P, Kaydanova T, Ginley D, Hoffmann-Eifert S, Böttger U, Waser Ret al., 2003, Shift of phase transition temperature in strontium titanate thin films, INTEGRATED FERROELECTRICS, Vol: 58, Pages: 1371-1379, ISSN: 1058-4587

Journal article

Alford NM, Petrov PK, Breeze J, Sarma KSet al., 2002, Piezoelectrically tuned dielectric resonators, ELECTRONICS LETTERS, Vol: 38, Pages: 855-857, ISSN: 0013-5194

Journal article

Petrov PK, Sarma V, Poole M, Alford NMet al., 2002, Preparation and properties of BSTO thick films on metal substrates, Ferroelectrics UK 2001 Meeting, Publisher: MANEY PUBLISHING, Pages: 113-117

Conference paper

Gevorgian S, Petrov PK, Ivanov Z, Wikborg Eet al., 2001, Tailoring the temperature coefficient of capacitance in ferroelectric varactors, APPLIED PHYSICS LETTERS, Vol: 79, Pages: 1861-1863, ISSN: 0003-6951

Journal article

Petrov PK, Alford NM, 2001, Tunable dielectric resonator with ferroelectric element, ELECTRONICS LETTERS, Vol: 37, Pages: 1066-1067, ISSN: 0013-5194

Journal article

Gevorgian S, Petrov P, Ivanov Z, Kollberg Eet al., 2001, Reduction of temperature coefficient of capacitance in microwave ferroelectric devices

A simple method is proposed (and verified experimentally) to reduce the Temperature Coefficient of Capacitance (TCC) in tuneable ferroelectric devices. It suggests use of two or more layers of ferroelectrics with different Curie temperatures to achieve temperature stabilisation, high tuneability, and small losses. © 2001 IEEE.

Conference paper

Gevorgian S, Eriksson A, Petrov P, Linner P, Lövestam G, Wikborg Eet al., 2001, DC field induced antiferroelectric phase transition in bulk, single crystal strontium titanate, 12th International Symposium on Integrated Ferroelectrics, Publisher: GORDON BREACH SCI PUBL LTD, Pages: 323-329, ISSN: 1058-4587

Conference paper

Gevorgian S, Petrov PK, Abadei S, Ivanov Zet al., 2001, Strain induced ferroelectrosity in epitaxial SrTiO<sub>3</sub> films, INTEGRATED FERROELECTRICS, Vol: 33, Pages: 311-321, ISSN: 1058-4587

Journal article

Petrov PK, Ivanov ZG, Gevorgyan SS, 2000, X-ray study of SrTiO<sub>3</sub> thin films in multilayer structures, MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, Vol: 288, Pages: 231-234, ISSN: 0921-5093

Journal article

Cho CR, Koh JH, Grishin A, Abadei S, Petrov P, Gevorgian Set al., 2000, Thin Na<inf>0.5</inf>K<inf>0.5</inf>NbO<inf>3</inf> films for varactor applications, Materials Research Society Symposium - Proceedings, Vol: 623, Pages: 109-118, ISSN: 0272-9172

Single phase Na0.5K0.5NbO3 (NKN) thin films have been pulsed laser deposited on SiO2/Si(001) wafers and LaAlO3(001) and MgO(001) single crystals. Radio frequency (up to 1 MHz) and microwave (up to 50 GHz) dielectric spectroscopy studies have been carried out to characterize thin NKN films for electrically tunable microwave device applications. Films on single crystal oxide substrates showed tunabilities as high as 30-40 % at 40 V bias and dissipation factor of 0.01-0.02 at 1 MHz. The films on Si substrates showed low dielectric losses of < 0.01, and low leakage currents. Dielectric properties of ferroelectric films on Si substrates at low frequencies are greatly influenced by the depletion capacitance and the resistance inserted by semiconductor substrate. Microwave frequency measurements for NKN film on Si wafers yield more than 10 % tunability at 50 GHz and loss tanδ<0.1 at 10 GHz.

Journal article

Petrov PK, Ivanov Z, Gevorgian S, 2000, SrTiO<inf>3</inf>-based varactors for Ka-band application: Preparation and properties

SrTiO3(STO)-based varactors with YBa2Cu 3O7-x (YBCO) electrodes were pulsed laser deposited on MgO substrate by using intermediate oxygen relaxation technique, i.e. the STO film was deposited in sequence of four 100nm thick layers with intermediate cooling in oxygen down to 300 °C. The oxygen treatment as well as introducing of a homoepitaxial MgO layer in between the MgO substrate and STO film, reduced the residual strain in the STO film and improved microwave properties of the varactors. Typical parameters of the varactors measured at 77K in a frequency range: 25 - 50 GHz were: capacitance, C, 30-40 fF, tuning C(0V)/C(40V) of 1.2, Q-factor of 20-40 and leakage current less than 0.25 nA, when a DC bias of 40V was applied. These results show applicability of the fabricated varactors at Ka band and higher frequencies. © 2000 IEEE.

Conference paper

Petrov PK, Hollmann EK, Volpyas VA, Volpyas AV, Tanaka T, Kawabata Ket al., 1999, Preparation of argon-free refractory thin films using RF-DC coupled magnetron sputtering, VACUUM, Vol: 53, Pages: 37-39, ISSN: 0042-207X

Journal article

Ryen L, Wang X, Petrov P, Carlsson E, Helmersson U, Olsson Eet al., 1999, Reduction of density of subgrain boundaries and misfit dislocations in epitaxial (001) SrTiO<sub>3</sub> thin films:: Effect on dielectric tunability, JOURNAL OF APPLIED PHYSICS, Vol: 85, Pages: 3976-3983, ISSN: 0021-8979

Journal article

Petrov PK, Volpyas VA, Chakalov RA, 1999, Three-dimensional Monte Carlo simulation of sputtered atom transport in the process of ion-plasma sputter deposition of multicomponent thin films, VACUUM, Vol: 52, Pages: 427-434, ISSN: 0042-207X

Journal article

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