• 9513 Citations
  • 46 h-Index
20012020

Research output per year

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Research Output

2012
2 Citations (Scopus)

Enhanced mechanical properties of nanocrystalline boron carbide by nanoporosity and interface phases

Madhav Reddy, K., Guo, J. J., Shinoda, Y., Fujita, T., Hirata, A., Singh, J. P., McCauley, J. W. & Chen, M. W., 2012 Oct 8, In : Nature communications. 3, 1052.

Research output: Contribution to journalArticle

68 Citations (Scopus)

Fabrication of nickel/organic-molecule/nickel nanoscale junctions utilizing thin-film edges and their structural and electrical properties

Kaiju, H., Kondo, K., Basheer, N., Kawaguchi, N., White, S., Hirata, A., Ishimaru, M., Hirotsu, Y. & Ishibashi, A., 2012 Jun 1, In : Japanese journal of applied physics. 51, 6 PART 1, 065202.

Research output: Contribution to journalArticle

2 Citations (Scopus)

Influence of aging and thermomechanical treatments on the mechanical properties of a nanocluster-strengthened ferritic steel

Zhang, Z. W., Liu, C. T., Wen, Y. R., Hirata, A., Guo, S., Chen, G., Chen, M. W. & Chin, B. A., 2012 Jan 1, In : Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science. 43, 1, p. 351-359 9 p.

Research output: Contribution to journalArticle

29 Citations (Scopus)

Innovative processing of high-strength and low-cost ferritic steels strengthened by Y-Ti-O nanoclusters

Wen, Y., Liu, Y., Hirata, A., Liu, F., Fujita, T., Dou, Y., Liu, D., Liu, B., Liu, Z. & Liu, C. T., 2012 May 15, In : Materials Science and Engineering A. 544, p. 59-69 11 p.

Research output: Contribution to journalArticle

23 Citations (Scopus)

Origin of ferromagnetism and oxygen-vacancy ordering induced cross-controlled magnetoelectric effects at room temperature

Wei, X. K., Zou, T., Wang, F., Zhang, Q. H., Sun, Y., Gu, L., Hirata, A., Chen, M. W., Yao, Y., Jin, C. Q. & Yu, R. C., 2012 Apr 1, In : Journal of Applied Physics. 111, 7, 073904.

Research output: Contribution to journalArticle

27 Citations (Scopus)

Structural origins of the excellent glass forming ability of Pd 40Ni 40P 20

Guan, P. F., Fujita, T., Hirata, A., Liu, Y. H. & Chen, M. W., 2012 Apr 24, In : Physical Review Letters. 108, 17, 175501.

Research output: Contribution to journalArticle

77 Citations (Scopus)
2011

Atomic structure of nanoclusters in oxide-dispersion-strengthened steels

Hirata, A., Fujita, T., Wen, Y. R., Schneibel, J. H., Liu, C. T. & Chen, M. W., 2011 Dec, In : Nature Materials. 10, 12, p. 922-926 5 p.

Research output: Contribution to journalArticle

254 Citations (Scopus)

Characterization of nanoscale mechanical heterogeneity in a metallic glass by dynamic force microscopy

Liu, Y. H., Wang, D., Nakajima, K., Zhang, W., Hirata, A., Nishi, T., Inoue, A. & Chen, M. W., 2011 Mar 23, In : Physical Review Letters. 106, 12, 125504.

Research output: Contribution to journalArticle

239 Citations (Scopus)

Direct observation of local atomic order in a metallic glass

Hirata, A., Guan, P., Fujita, T., Hirotsu, Y., Inoue, A., Yavari, A. R., Sakurai, T. & Chen, M., 2011 Jan, In : Nature Materials. 10, 1, p. 28-33 6 p.

Research output: Contribution to journalArticle

310 Citations (Scopus)

Effect of residual silver on surface-enhanced raman scattering of dealloyed nanoporous gold

Zhang, L., Chen, L., Liu, H., Hou, Y., Hirata, A., Fujita, T. & Chen, M., 2011 Oct 13, In : Journal of Physical Chemistry C. 115, 40, p. 19583-19587 5 p.

Research output: Contribution to journalArticle

51 Citations (Scopus)

Enhancement of nanovoid formation in annealed amorphous Al 2O3 including W

Nakamura, R., Ishimaru, M., Hirata, A., Sato, K., Tane, M., Kimizuka, H., Shudo, T., Konno, T. J. & Nakajima, H., 2011 Sep 15, In : Journal of Applied Physics. 110, 6, 064324.

Research output: Contribution to journalArticle

9 Citations (Scopus)

Modulated Na2Ti4O9:Zr nanobelt via site-specific Zr doping

He, X., Wang, Z., Hirata, A., Gu, L., Chen, M. & Duan, X., 2011 Aug 1, In : Applied Physics Express. 4, 8, 085003.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Nanoporous metal/oxide hybrid electrodes for electrochemical supercapacitors

Lang, X., Hirata, A., Fujita, T. & Chen, M., 2011 Apr, In : Nature Nanotechnology. 6, 4, p. 232-236 5 p.

Research output: Contribution to journalArticle

1470 Citations (Scopus)

Nanoporous PdNi bimetallic catalyst with enhanced electrocatalytic performances for electro-oxidation and oxygen reduction reactions

Chen, L., Guo, H., Fujita, T., Hirata, A., Zhang, W., Inoue, A. & Chen, M., 2011 Nov 22, In : Advanced Functional Materials. 21, 22, p. 4364-4370 7 p.

Research output: Contribution to journalArticle

202 Citations (Scopus)

Nanovoid formation through the annealing of amorphous Al2O 3 and WO3 films

Nakamura, R., Shudo, T., Hirata, A., Ishimaru, M. & Nakajima, H., 2011 Jan, In : Scripta Materialia. 64, 2, p. 197-200 4 p.

Research output: Contribution to journalArticle

16 Citations (Scopus)

Surface and interface structures and magnetic properties of Ni and Ni 75Fe25 thin films on polyethylene naphthalate Organic Substrates

Kaiju, H., Basheer, N., Abe, T., Kondo, K., Hirata, A., Ishimaru, M., Hirotsu, Y. & Ishibashi, A., 2011 Aug 26, In : Journal of the Vacuum Society of Japan. 54, 3, p. 203-206 4 p.

Research output: Contribution to journalArticle

TEM analysis on nanovoid formation in annealed amorphous oxides

Nakamura, R., Shudo, T., Hirata, A., Ishimaru, M. & Nakajima, H., 2011 Jan 1, Eco-Materials Processing and Design XII. Trans Tech Publications Ltd, p. 541-544 4 p. (Materials Science Forum; vol. 695).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Wrinkled nanoporous gold films with ultrahigh surface-enhanced raman scattering enhancement

Zhang, L., Lang, X., Hirata, A. & Chen, M., 2011 Jun 28, In : ACS Nano. 5, 6, p. 4407-4413 7 p.

Research output: Contribution to journalArticle

181 Citations (Scopus)
2010

Deformation-induced change in the structure of metallic glasses during multistep indentation

Pan, D., Liu, H. W., Fujita, T., Hirata, A., Inoue, A., Sakurai, T. & Chen, M. W., 2010 Apr 12, In : Physical Review B - Condensed Matter and Materials Physics. 81, 13, 132201.

Research output: Contribution to journalArticle

7 Citations (Scopus)

Doping effect on charge ordered structure in RFe2O4 (R=Lu and Yb)

Matsuo, Y., Mori, S., Hirata, A., Yoshii, K. & Ikeda, N., 2010, In : Journal of Physics: Conference Series. 200, SECTION 1, 012128.

Research output: Contribution to journalConference article

3 Citations (Scopus)

Fabrication and current-voltage characteristics of Ni spin quantum cross devices with P3HT:PCBM organic materials

Kaiju, H., Kondo, K., Basheer, N., Kawaguchi, N., White, S., Hirata, A., Ishimaru, M., Hirotsu, Y. & Ishibashi, A., 2010 Dec 1, Materials and Devices for End-of-Roadmap and Beyond CMOS Scaling. p. 133-138 6 p. (Materials Research Society Symposium Proceedings; vol. 1252).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Quasicrystal-like structure and its crystalline approximant in an Fe 48Cr15Mo14C15B6Tm 2 bulk metallic glass

Hirata, A., Hirotsu, Y., Amiya, K. & Inoue, A., 2010 Aug 1, In : Journal of Alloys and Compounds. 504, SUPPL. 1, p. S186-S189

Research output: Contribution to journalArticle

10 Citations (Scopus)

Structure analyses of fe-based metallic glasses by electron diffraction

Hirata, A. & Hirotsu, Y., 2010 Dec 1, In : Materials. 3, 12, p. 5263-5273 11 p.

Research output: Contribution to journalArticle

8 Citations (Scopus)

The fabrication of Ni quantum cross devices with a 17nm junction and their current-voltage characteristics

Kaiju, H., Kondo, K., Ono, A., Kawaguchi, N., Won, J., Hirata, A., Ishimaru, M., Hirotsu, Y. & Ishibashi, A., 2010 Jan 1, In : Nanotechnology. 21, 1, 015301.

Research output: Contribution to journalArticle

4 Citations (Scopus)
2009

Analysis of crystalline nano structures embedded in amorphous films by selected area nano diffraction in a Cs-corrected TEM

Yamasaki, J., Morishita, S., Tanaka, N., Hirata, A., Hirotsu, Y. & Kato, T., 2009 Jul 1, In : Microscopy and Microanalysis. 15, SUPPL. 2, p. 760-761 2 p.

Research output: Contribution to journalArticle

Crystallization behaviours around the glass transition temperature in an amorphous Fe-Nb-B alloy

Hirata, A., Hirotsu, Y. & Matsubara, E., 2009 Oct 1, In : Intermetallics. 17, 10, p. 796-801 6 p.

Research output: Contribution to journalArticle

9 Citations (Scopus)

Fe23B6 -type quasicrystal-like structures without icosahedral atomic arrangement in an Fe-based metallic glass

Hirata, A., Hirotsu, Y., Amiya, K., Nishiyama, N. & Inoue, A., 2009 Oct 29, In : Physical Review B - Condensed Matter and Materials Physics. 80, 14, 140201.

Research output: Contribution to journalArticle

25 Citations (Scopus)

Irradiation-induced amorphous structures studied by electron diffraction radial distribution function analysis

Ishimaru, M., Naito, M. & Hirata, A., 2009 Jul 1, In : Microscopy and Microanalysis. 15, SUPPL. 2, p. 1346-1347 2 p.

Research output: Contribution to journalArticle

1 Citation (Scopus)

Local structural fluctuation in Pd-Ni-P bulk metallic glasses examined using nanobeam electron diffraction

Hirata, A., Hirotsu, Y., Kuboya, S. & Nieh, T. G., 2009 Aug 26, In : Journal of Alloys and Compounds. 483, 1-2, p. 64-69 6 p.

Research output: Contribution to journalArticle

12 Citations (Scopus)

Local structure changes on annealing in an Fe-Si-B-P bulk metallic glass

Hirata, A., Kawahara, N., Hirotsu, Y. & Makino, A., 2009 Apr 1, In : Intermetallics. 17, 4, p. 186-189 4 p.

Research output: Contribution to journalArticle

23 Citations (Scopus)

Nanometer-sized domain structures in LuFeMO4 (M = Cu, Co) revealed by energy-filtered transmission electron microscopy

Matuso, Y., Hirata, A., Horibe, Y., Yoshii, K., Ikeda, N. & Mori, S., 2009 Dec 1, In : Ferroelectrics. 380, 1 PART 1, p. 56-62 7 p.

Research output: Contribution to journalConference article

4 Citations (Scopus)

Nanoscale metastable state exhibiting pseudotenfold diffraction pattern in Fe-based bulk metallic glass

Hirata, A., Hirotsu, Y., Amiya, K. & Inoue, A., 2009 Jan 5, In : Physical Review B - Condensed Matter and Materials Physics. 79, 2, 020205.

Research output: Contribution to journalArticle

9 Citations (Scopus)

Ni thin films vacuum-evaporated on polyethylene naphthalate substrates with and without the application of magnetic field

Kaiju, H., Ono, A., Kawaguchi, N., Kondo, K., Ishibashi, A., Won, J., Hirata, A., Ishimaru, M. & Hirotsu, Y., 2009 Jan 1, In : Applied Surface Science. 255, 6, p. 3706-3712 7 p.

Research output: Contribution to journalArticle

10 Citations (Scopus)

Specific surface effect on transport properties of NiO/MgO heterostructured nanowires

Oka, K., Yanagida, T., Nagashima, K., Tanaka, H., Seki, S., Honsho, Y., Ishimaru, M., Hirata, A. & Kawai, T., 2009 Oct 12, In : Applied Physics Letters. 95, 13, 133110.

Research output: Contribution to journalArticle

21 Citations (Scopus)
2008

Crystallization process and glass stability of an Fe48Cr 15 Mo14C15B6Tm2 bulk metallic glass

Hirata, A., Hirotsu, Y., Amiya, K. & Inoue, A., 2008 Oct 27, In : Physical Review B - Condensed Matter and Materials Physics. 78, 14, 144205.

Research output: Contribution to journalArticle

31 Citations (Scopus)

Direct observations of thermally induced structural changes in amorphous silicon carbide

Ishimaru, M., Hirata, A., Naito, M., Bae, I. T., Zhang, Y. & Weber, W. J., 2008 Aug 25, In : Journal of Applied Physics. 104, 3, 033503.

Research output: Contribution to journalArticle

33 Citations (Scopus)

Nanocrystallization of complex Fe23B6-type structure in glassy Fe-Co-B-Si-Nb alloy

Hirata, A., Hirotsu, Y., Amiya, K., Nishiyama, N. & Inoue, A., 2008 Apr 1, In : Intermetallics. 16, 4, p. 491-497 7 p.

Research output: Contribution to journalArticle

47 Citations (Scopus)

Role of the triclinic Al2Fe structure in the formation of the Al5Fe2-approximant

Hirata, A., Mori, Y., Ishimaru, M. & Koyama, Y., 2008 Jul 1, In : Philosophical Magazine Letters. 88, 7, p. 491-500 10 p.

Research output: Contribution to journalArticle

3 Citations (Scopus)
2007

Change of nanostructure in (Fe0.5Co0.5) 72B20Si4Nb4 metallic glass on annealing

Hirata, A., Hirotsu, Y., Amiya, K., Nishiyama, N. & Inoue, A., 2007 Jan 1, Supplement to THERMEC 2006, 5th International Conference on PROCESSING and MANUFACTURING OF ADVANCED MATERIALS, THERMEC 2006. PART 2 ed. Trans Tech Publications Ltd, p. 2077-2081 5 p. (Materials Science Forum; vol. 539-543, no. PART 2).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Direct imaging of local atomic ordering in a Pd-Ni-P bulk metallic glass using Cs-corrected transmission electron microscopy

Hirata, A., Hirotsu, Y., Nieh, T. G., Ohkubo, T. & Tanaka, N., 2007 Feb 1, In : Ultramicroscopy. 107, 2-3, p. 116-123 8 p.

Research output: Contribution to journalArticle

22 Citations (Scopus)

Local atomic structure analysis of Zr-Ni and Zr-Cu metallic glasses using electron diffraction

Hirata, A., Morino, T., Hirotsu, Y., Itoh, K. & Fukunaga, T., 2007 Jun 1, In : Materials Transactions. 48, 6, p. 1299-1303 5 p.

Research output: Contribution to journalArticle

23 Citations (Scopus)

Mössbauer study of ultrathin FeAl multilayer films

Kaptás, D., Balogh, J., Kemény, T., Kiss, L. F., Bujdosó, L., Kovács, A., Hirata, A. & Vincze, I., 2007 Jan 25, In : Physical Review B - Condensed Matter and Materials Physics. 75, 1, 014417.

Research output: Contribution to journalArticle

9 Citations (Scopus)

Post-annealing recrystallization and damage recovery process in Fe ion implanted Si

Naito, M., Hirata, A., Ishimaru, M. & Hirotsu, Y., 2007 Apr 1, In : Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms. 257, 1-2 SPEC. ISS., p. 340-343 4 p.

Research output: Contribution to journalArticle

Structural analysis of polycrystalline BiFeO3 films by transmission electron microscopy

Naganuma, H., Kovacs, A., Hirata, A., Hirotsu, Y. & Okamura, S., 2007 Sep 1, In : Materials Transactions. 48, 9, p. 2370-2373 4 p.

Research output: Contribution to journalArticle

6 Citations (Scopus)

Voronoi analysis of the structure of Ni-Zr-Al ternary metallic glass

Fukunaga, T., Itoh, K., Otomo, T., Mori, K., Sugiyama, M., Kato, H., Hasegawa, M., Hirata, A., Hirotsu, Y. & Hannon, A. C., 2007 Jul 1, In : Materials Transactions. 48, 7, p. 1698-1702 5 p.

Research output: Contribution to journalArticle

31 Citations (Scopus)
2006

Application of energy-filtering TEM to the nanocrystallization process in amorphous Fe84Nb7B9 alloy

Hirata, A. & Hirotsu, Y., 2006 May 1, In : Journal of Materials Science. 41, 9, p. 2597-2600 4 p.

Research output: Contribution to journalArticle

5 Citations (Scopus)
13 Citations (Scopus)

Chemical short-range order in ion-beam-induced amorphous SiC: Irradiation temperature dependence

Ishimaru, M., Bae, I. T., Hirata, A., Hirotsu, Y., Valdez, J. A. & Sickafus, K. E., 2006 Jan 1, In : Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms. 242, 1-2, p. 473-475 3 p.

Research output: Contribution to journalArticle

10 Citations (Scopus)