Zobrazeno 1 - 10
of 110
pro vyhledávání: '"N. McN. Alford"'
Autor:
Victor M. Ferreira, N McN Alford, Robert C. Pullar, Andrei N. Salak, José Leonardo Ribeiro, L. G. Vieira
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Dielectric response of the perovskite ceramics (1–x)La(Mg1/2Ti1/2)O3–x(Na1/2Bi1/2)TiO3 [(1–x)LMT–xNBT] (0 ⩽ x ⩽ 0.6) has been characterized at radio, microwave, and far infrared frequency ranges. Temperature variations of the dielectric p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::30fc1bc673be3c9ebfefd8a03fe80432
https://doi.org/10.1557/jmr.2007.0365
https://doi.org/10.1557/jmr.2007.0365
Autor:
N McN Alford, A. B. Kozyrev, V. Keis, P.V. Kulik, Peter K. Petrov, O. Buslov, I.V. Kotelnikov
Publikováno v:
Integrated Ferroelectrics. 77:123-128
A frequency tuneable microwave filter based on two dual mode dielectric resonators has been developed. Tuning of the filter was realised by using metal plates located over the dielectric resonators and moved along the resonator axis by piezoelectric
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::47cd0a53c6ad0487de4c17a2f39577a4
https://doi.org/10.1080/10584580500414291
https://doi.org/10.1080/10584580500414291
Publikováno v:
Key Engineering Materials. :1157-1160
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::753471d9f02980219a03324db6b2c8bf
https://doi.org/10.4028/www.scientific.net/kem.264-268.1157
https://doi.org/10.4028/www.scientific.net/kem.264-268.1157
Autor:
D. Noujni, Jan Petzelt, Ian M. Reaney, P. L. Wise, Alexej Pashkin, Viktor Bovtun, Anna-Karin Axelsson, Stanislav Kamba, N McN Alford
Publikováno v:
Integrated Ferroelectrics. 62:199-203
The microwave, near-millimetre and infrared (IR) dielectric response of Srn + 1TinO3n + 1 (n = 1–4) Ruddlesden-Popper homologous series was studied in the temperature range 10 to 300 K. Remarkable softening of the polar optical mode was observed in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0f5db26d590a6918757489ad6b1e4aa1
https://doi.org/10.1080/10584580490457820
https://doi.org/10.1080/10584580490457820
Autor:
A. B. Kozyrev, N McN Alford, O. Buslov, Peter K. Petrov, I.V. Kotelnikov, P.V. Kulik, V. Keis
Publikováno v:
Integrated Ferroelectrics. 66:261-266
A frequency tuneable microwave filter based on a dual mode dielectric resonator has been developed. Tuning of the filter was realised by using metal plate located over the dielectric resonator and moved along the resonator axis by a piezoelectric bim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::67251ebdf068a8eb019d3677322e4aa7
https://doi.org/10.1080/10584580490895581
https://doi.org/10.1080/10584580490895581
Autor:
Peter K. Petrov, D. S. Ginley, K. F. Astafiev, N McN Alford, Nava Setter, Alexander K. Tagantsev, T. Kaydanova
Publikováno v:
Integrated Ferroelectrics. 53:465-473
Structural investigations of SrTiO3 thin films deposited by pulsed laser ablation onto MgO and LaAlO3 substrates are presented. The residual strain along the c -axis (the growth direction) was evaluated with conventional X-ray diffraction. Evaluation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7cb22fcb89677091162d0273bf659f7e
https://doi.org/10.1080/714040695
https://doi.org/10.1080/714040695
Publikováno v:
Journal of the European Ceramic Society. 23:2479-2483
Of the niobate ceramics with the formula M 2+ Nb 2 O 6 , several compounds (M 2+ =Zn, Mg, Ca and Co) have Qf values (at f =1–10 GHz) between 40 000 and 90 000 GHz, offering potential in dielectric resonator applications. However, their temperature
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::39f148319f801c9c72d9b25df21e456a
https://doi.org/10.1016/s0955-2219(03)00133-x
https://doi.org/10.1016/s0955-2219(03)00133-x
Autor:
A. Sharma, Anna-Karin Axelsson, J. L. MacManus Driscoll, Andrey Berenov, Lesley F. Cohen, Karen A. Yates, N McN Alford
Publikováno v:
Journal of Magnetism and Magnetic Materials. 247:105-110
With the aim of finding a simple route to enhancement of the low field, magnetoresistive effect in manganites, polycrystalline samples of La 0.67 Ca 0.33 MnO 3 with different density and grain size were preferentially deoxygenated in defective region
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ff36904c98d1e060092ab23e07e22a4
https://doi.org/10.1016/s0304-8853(02)00181-6
https://doi.org/10.1016/s0304-8853(02)00181-6
Autor:
N McN Alford, D.S. Cannell, Ian M. Reaney, Jonathan Breeze, P. L. Wise, T. Price, Rick Ubic, D. Iddles
Publikováno v:
Philosophical Magazine A. 81:501-510
Developing a material with a temperature coefficient of the resonant frequency (TCF) of zero is probably the most difficult aspect of research into microwave dielectric ceramics. There are a host of high-quality-factor (Q) high-relative-permittivity
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c3ad142cabff2887c0ca3f3d2e4a7ee0
https://doi.org/10.1080/01418610108214318
https://doi.org/10.1080/01418610108214318
Autor:
S.J. Penn, N McN Alford, Neboysha Ljepojevic, Xavi Aupi, Xiaoru Wang, Jonathan Breeze, Silvia Dalla, S.J. Webb
Publikováno v:
Journal of the European Ceramic Society. 21:2605-2611
The key factors influencing microwave dielectric loss are examined. A comparison is made between single crystals and polycrystalline analogues. Measurements of the temperature dependence of microwave dielectric losses in various materials are reporte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::649e5789b9f910bf6056bc0673cea2ff
https://doi.org/10.1016/s0955-2219(01)00324-7
https://doi.org/10.1016/s0955-2219(01)00324-7