Imperial College London

ProfessorNeilAlford

Central FacultyOffice of the Provost

Associate Provost (Academic Planning)
 
 
 
//

Contact

 

+44 (0)20 7594 6724n.alford

 
 
//

Assistant

 

Miss Catherine Graham +44 (0)20 7594 3330

 
//

Location

 

2..05 (in RSM) or 3.09 (in the Faculty Building)Royal School of MinesSouth Kensington Campus

//

Summary

 

Publications

Publication Type
Year
to

395 results found

Breeze JD, Salvadori E, Sathian J, Alford NM, Kay CWMet al., 2018, Continuous-wave room-temperature diamond maser, NATURE, Vol: 555, Pages: 493-+, ISSN: 0028-0836

JOURNAL ARTICLE

Wells MP, Bower R, Kilmurray R, Zou B, Mihai AP, Gobalakrichenane G, Alford NM, Oulton RFM, Cohen LF, Maier SA, Zayats A, Petrov PKet al., 2018, Temperature stability of thin film refractory plasmonic materials, OPTICS EXPRESS, Vol: 26, Pages: 15726-15744, ISSN: 1094-4087

JOURNAL ARTICLE

Wells MP, Zou B, Mihai AP, Bower R, Doiron B, Regoutz A, Fearn S, Maier SA, Alford NM, Petrov PKet al., 2018, Multiphase strontium molybdate thin films for plasmonic local heating applications, Optical Materials Express, Vol: 8, Pages: 1806-1817

© 2018 Optical Society of America. In the search for alternative plasmonic materials, SrMoO3 has recently been identified as possessing a number of desirable optical properties. Owing to the requirement for many plasmonic devices to operate at elevated temperatures however, it is essential to characterize the degradation of these properties upon heating. Here, SrMoO3 thin films are annealed in air at temperatures ranging from 75-500° C. Characterizations by AFM, XRD, and spectroscopic ellipsometry after each anneal identify a loss of metallic behaviour after annealing at 500° C, together with the underlying mechanism. Moreover, it is shown that by annealing the films in nitrogen following deposition, an additional crystalline phase of SrMoO4is induced at the film's surface, which suppresses oxidation at elevated temperatures.

JOURNAL ARTICLE

Axelsson A-K, Le Goupil F, Valant M, Alford NMet al., 2017, Electrocaloric effect in lead-free Aurivillius relaxor ferroelectric ceramics, ACTA MATERIALIA, Vol: 124, Pages: 120-126, ISSN: 1359-6454

JOURNAL ARTICLE

Braic L, Vasilantonakis N, Mihai A, Garcia IJV, Fearn S, Zou B, Alford NM, Doiron B, Oulton RF, Maier SA, Zayats AV, Petrov PKet al., 2017, Titanium Oxynitride Thin Films with Tunable Double Epsilon-Near-Zero Behavior for Nanophotonic Applications, ACS APPLIED MATERIALS & INTERFACES, Vol: 9, Pages: 29857-29862, ISSN: 1944-8244

JOURNAL ARTICLE

Breeze JD, Salvadori E, Sathian J, Alford NMN, Kay CWMet al., 2017, Room-temperature cavity quantum electrodynamics with strongly coupled Dicke states, NPJ QUANTUM INFORMATION, Vol: 3, ISSN: 2056-6387

JOURNAL ARTICLE

Doiron B, Li Y, Mihai AP, Cohen LF, Pretrov PK, Alford NM, Oulton RF, Maier SAet al., 2017, Comparison of the ultrafast hot electron dynamics of titanium nitride and gold for plasmonic applications, SPIE Optics + Photonics Conference on Plasmonics - Design, Materials, Fabrication, Characterization, and Applications XV, Publisher: SPIE-INT SOC OPTICAL ENGINEERING, ISSN: 0277-786X

CONFERENCE PAPER

Pang J, Theodorou IG, Centeno A, Petrov PK, Alford NM, Ryan MP, Xie Fet al., 2017, Gold nanodisc arrays as near infrared metal-enhanced fluorescence platforms with tuneable enhancement factors, JOURNAL OF MATERIALS CHEMISTRY C, Vol: 5, Pages: 917-925, ISSN: 2050-7526

JOURNAL ARTICLE

Ptashnik SV, Mikhailov AK, Yastrebov AV, Petrov PK, Liu W, Alford NM, Hirsch S, Kozyrev ABet al., 2017, Ferroelectric thin film acoustic devices with electrical multiband switching ability, SCIENTIFIC REPORTS, Vol: 7, ISSN: 2045-2322

JOURNAL ARTICLE

Salvadori E, Breeze JD, Tan K-J, Sathian J, Richards B, Fung MW, Wolfowicz G, Oxborrow M, Alford NM, Kay CWMet al., 2017, Nanosecond time-resolved characterization of a pentacene-based room-temperature MASER, SCIENTIFIC REPORTS, Vol: 7, ISSN: 2045-2322

JOURNAL ARTICLE

Sathian J, Breeze JD, Richards B, Alford NM, Oxborrow Met al., 2017, Solid-state source of intense yellow light based on a Ce:YAG luminescent concentrator, OPTICS EXPRESS, Vol: 25, Pages: 13714-13727, ISSN: 1094-4087

JOURNAL ARTICLE

Wells MP, Zou B, Doiron BG, Kilmurray R, Mihai AP, Oulton RFM, Gubeljak P, Ormandy KL, Mallia G, Harrison NM, Cohen LF, Maier SA, Alford NM, Petrov PKet al., 2017, Tunable, Low Optical Loss Strontium Molybdate Thin Films for Plasmonic Applications, ADVANCED OPTICAL MATERIALS, Vol: 5, ISSN: 2195-1071

JOURNAL ARTICLE

Berenov A, Le Goupil F, Alford N, 2016, Effect of ionic radii on the Curie temperature in Ba1-x-ySrxCayTiO3 compounds, SCIENTIFIC REPORTS, Vol: 6, ISSN: 2045-2322

JOURNAL ARTICLE

Le Goupil F, Alford NM, 2016, Upper limit of the electrocaloric peak in lead-free ferroelectric relaxor ceramics, APL MATERIALS, Vol: 4, ISSN: 2166-532X

JOURNAL ARTICLE

Le Goupil F, McKinnon R, Koval V, Viola G, Dunn S, Berenov A, Yan H, Alford NMet al., 2016, Tuning the electrocaloric enhancement near the morphotropic phase boundary in lead-free ceramics, SCIENTIFIC REPORTS, Vol: 6, ISSN: 2045-2322

JOURNAL ARTICLE

Liu G, Feng H, Liu B, Wang Y, Liu W, Zou B, Alford NM, Petrov PKet al., 2016, Formation of V-grooves in SrRuO3 epitaxial film, JOURNAL OF CRYSTAL GROWTH, Vol: 455, Pages: 13-18, ISSN: 0022-0248

JOURNAL ARTICLE

Liu G, Wang Y, Zou B, Liang W, Alford NM, McComb DW, Petrov PKet al., 2016, Probing the Electronic Structures of BaTiO3/SrTiO3 Multilayered Film with Spatially Resolved Electron Energy-Loss Spectroscopy, JOURNAL OF PHYSICAL CHEMISTRY C, Vol: 120, Pages: 16681-16686, ISSN: 1932-7447

JOURNAL ARTICLE

Niedermeier CA, Rasander M, Rhode S, Kachkanov V, Zou B, Alford N, Moram MAet al., 2016, Band gap bowing in NixMg1-xO, SCIENTIFIC REPORTS, Vol: 6, ISSN: 2045-2322

JOURNAL ARTICLE

Sanlialp M, Shvartsman VV, Acosta M, Lupascu DC, Alford Net al., 2016, Electrocaloric Effect in Ba(Zr,Ti)O<inf>3</inf>–(Ba,Ca)TiO<inf>3</inf>Ceramics Measured Directly, Journal of the American Ceramic Society, Vol: 99, Pages: 4022-4030, ISSN: 0002-7820

© 2016 The American Ceramic Society In this paper, we report on studies of the electrocaloric (EC) effect in lead-free (1−x)Ba(Zr0.2Ti0.8)O3–x(Ba0.7Ca0.3)TiO3ceramics with compositions range between 0.32 ≤ x ≤ 0.45. The EC effect was measured directly using a modified differential scanning calorimeter. The maximum EC temperature change, ΔTdirect= 0.33 K under an electric field of 2 kV/mm, was observed for the composition with x = 0.32 at ~63°C. We found that the EC effect peaks not only around the Curie temperature but also at the transition between the ferroelectric phases with different symmetries. A strong discrepancy observed between the results of the direct measurements and indirect estimations points out that using Maxwell's equations is invalid for the thermodynamic nonequilibrium conditions that accompany only partial (incomplete) poling of ceramics. We also observe a nonlinearity of the EC effect above the Curie temperature and in the temperature range corresponding to the tetragonal ferroelectric phase.

JOURNAL ARTICLE

Zhang X, Wu X, Centeno A, Ryan MP, Alford NM, Riley DJ, Xie Fet al., 2016, Significant Broadband Photocurrent Enhancement by Au-CZTS Core-Shell Nanostructured Photocathodes, SCIENTIFIC REPORTS, Vol: 6, ISSN: 2045-2322

JOURNAL ARTICLE

Zou B, Walker C, Wang K, Tileli V, Shaforost O, Harrison NM, Klein N, Alford NM, Petrov PKet al., 2016, Growth of Epitaxial Oxide Thin Films on Graphene, SCIENTIFIC REPORTS, Vol: 6, ISSN: 2045-2322

JOURNAL ARTICLE

Braic L, Vasilantonakis N, Zou B, Maier SA, Alford NM, Zayats AV, Petrov PKet al., 2015, Optimizing Strontium Ruthenate Thin Films for Near-Infrared Plasmonic Applications, SCIENTIFIC REPORTS, Vol: 5, ISSN: 2045-2322

JOURNAL ARTICLE

Breeze J, Tan K-J, Richards B, Sathian J, Oxborrow M, Alford NMet al., 2015, Enhanced magnetic Purcell effect in room-temperature masers, NATURE COMMUNICATIONS, Vol: 6, ISSN: 2041-1723

JOURNAL ARTICLE

Le Goupil F, Bennett J, Axelsson A-K, Valant M, Berenov A, Bell AJ, Comyn TP, Alford NMet al., 2015, Electrocaloric enhancement near the morphotropic phase boundary in lead-free NBT-KBT ceramics, APPLIED PHYSICS LETTERS, Vol: 107, ISSN: 0003-6951

JOURNAL ARTICLE

Roqan IS, Venkatesh S, Zhang Z, Hussain S, Bantounas I, Franklin JB, Flemban TH, Zou B, Lee J-S, Schwingenschlogl U, Petrov PK, Ryan MP, Alford NMet al., 2015, Obtaining strong ferromagnetism in diluted Gd-doped ZnO thin films through controlled Gd-defect complexes, JOURNAL OF APPLIED PHYSICS, Vol: 117, ISSN: 0021-8979

JOURNAL ARTICLE

Tileli V, Duchamp M, Axelsson A-K, Valant M, Dunin-Borkowski RE, Alford NMet al., 2015, On stoichiometry and intermixing at the spinel/perovskite interface in CoFe2O4/BaTiO3 thin films, NANOSCALE, Vol: 7, Pages: 218-224, ISSN: 2040-3364

JOURNAL ARTICLE

Venkatesh S, Franklin JB, Ryan MP, Lee J-S, Ohldag H, McLachlan MA, Alford NM, Roqan ISet al., 2015, Defect-band mediated ferromagnetism in Gd-doped ZnO thin films, JOURNAL OF APPLIED PHYSICS, Vol: 117, ISSN: 0021-8979

JOURNAL ARTICLE

Wu X, Centeno A, Zhang X, Darvill D, Ryan MP, Riley DJ, Alford NM, Xie Fet al., 2015, Broadband plasmon photocurrent generation from Au nanoparticles/mesoporous TiO2 nanotube electrodes, SOLAR ENERGY MATERIALS AND SOLAR CELLS, Vol: 138, Pages: 80-85, ISSN: 0927-0248

JOURNAL ARTICLE

Altynnikov AG, Gagarin AG, Gaidukov MM, Tumarkin AV, Petrov PK, Alford N, Kozyrev ABet al., 2014, Suppression of slow capacitance relaxation phenomenon in Pt/Ba0.3Sr0.7TiO3/Pt thin film ferroelectric structures by annealing in oxygen atmosphere, APPLIED PHYSICS LETTERS, Vol: 104, ISSN: 0003-6951

JOURNAL ARTICLE

Appleby DJR, Ponon NK, Kwa KSK, Ganti S, Hannemann U, Petrov PK, Alford NM, O'Neill Aet al., 2014, Ferroelectric properties in thin film barium titanate grown using pulsed laser deposition, JOURNAL OF APPLIED PHYSICS, Vol: 116, ISSN: 0021-8979

JOURNAL ARTICLE

This data is extracted from the Web of Science and reproduced under a licence from Thomson Reuters. You may not copy or re-distribute this data in whole or in part without the written consent of the Science business of Thomson Reuters.

Request URL: http://wlsprd.imperial.ac.uk:80/respub/WEB-INF/jsp/search-html.jsp Request URI: /respub/WEB-INF/jsp/search-html.jsp Query String: respub-action=search.html&id=00506609&limit=30&person=true