Personal Details

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Dr. Hnin Yu Yu Ko

Scientist II

Staff

Advanced Characterisation and Instrumentation (ACI) Department

67149176

Hnin_Yu_Yu_Ko@imre.a-star.edu.sg

2 Fusionopolis Way, Innovis, #08-03, Singapore 138634


Research Details


Structural and characterizations on metal surfaces and interfaces

Self-assembly of nanoparticles and nanocomposite

Magnetism and Magnetic Materials

Material Characterization & Failure Analysis


Nanofabrication [composite films via liquid phase deposition (LPD), particles, composites (self-assembly) and pattern templates via block copolymers]

Characterization work on

- Structural and compositional analysis:

XRD, AFM, SEM-EDX, Fourier transform infrared spectroscopy

(FTIR), Raman, UV-Vis, Photoluminescence (PL), Secondary Ion Mass Spectrometry (TOF-SIMS)

- Thickness, interface roughness and density:

X-ray Reflectivity (XRR): Ellipsometry

- Elemental analysis:

X-ray fluorescence (XRF), Total Reflection X-ray Fluorescence (TXRF)

- Surface energy:

Contact angle goniometry


2008-2013: project member on the projects related with “induced Perpendicular magnetic recording (PMR), Bit-Pattern-Media (BPM) and Heat Assisted Magnetic Recording (HAMR)”, Data Storage Institute

2013-2018: project member on “Material characterization and Failure Analysis”, Data Storage Institute

Jun 2018-present: Scientist II, Advanced Characterisation and Instrumentation, IMRE

Mar 2013- May 2018: Scientist II, Materials Science Laboratory, DSI

Sep 2008- Feb 2013: Scientist I, Drive Systems and Technologies Division, DSI

Apr 2005- July 2008: Post-doctoral fellow, Information Storage Materials Laboratory, Toyota Technological Institute, Japan.

Apr 2002- Mar 2005: Post-doctoral fellow, Chemistry department, School of Science and Technology, Kwansei Gakuen University, Japan.

 

2008-2013: project member on the projects related with “induced Perpendicular magnetic recording (PMR), Bit-Pattern-Media (BPM) and Heat Assisted Magnetic Recording (HAMR)”, Data Storage Institute

2013-2018: project member on “Material characterization and Failure Analysis”, Data Storage Institute


D.Eng. (Molecular Science), Chemical Science and Eng, Kobe University, Japan, 2002

M.Eng. (Chemical Science and Eng.), Kobe University, Japan, 1999    

B.Eng. (Chemical Eng.), Yangon Institute of Technology, Myanmar, 1996.

B.Sc. (Industrial Chemistry), Yangon University, Myanmar, 1994.


Rotary International Yoneyama Scholarship, 1997-1999, Kobe University, Japan.

Sensyu Foreign Student Scholarship, 1999-2002, Kobe University, Japan.

Third prize in the poster session in international symposium on material processing for nanostructured device (MPND 2001), Japan.

Outstanding contribution to Asian Fluorine Conference for Young Chemists, 2002, Tokyo, Japan.

Toyota Fellowship Foundation Research Promotion Awards for 2007, Toyota Technological Institute, Nagoya, Japan.

Best paper 2013 (Category: Basic Science) from Data Storage Institute (DSI) on "L. Shen, T. Zhou, R. Q. Wee, K. M. Cher, Hnin Yu Yu Ko, R. Niu, H. Gong, A. Yuan, B. Liu, and Y. P. Feng, Advanced Materials, 25, 1639-1645, 2013."


IEEE Magnetic Society (2008-Present)

IEEE Communication Society (2008-2009)

The Magnetic Society of Japan (2005-2009)

Royal Society of Chemistry (1999-2002)

Chemical Society of Japan (1997-2005)

 
  1. T. Zhou, L. Meihua, L. Shen, R. Q. Wee, H. Gong, K. M. Cher, Hnin Yu Yu Ko, Y. Zhimin, B. Liu, and Y. P. Feng, “Synthesis, Characterization and Hard Ferromagnetism in FePt/ZnO Nanocomposites with Ultra-Small Size ”, IEEE Transactions on Magnetics, 50 (1), 2014.
  2. L. Shen, T. Zhou, R. Q. Wee, K. M. Cher, Hnin Yu Yu Ko, R. Niu, H. Gong, A. Yuan, B. Liu, and Y. P. Feng, “Room-Temperature Ferromagnetism in ZnO-Encapsulated 1.9 nm FePt3 Nanoparticle-composite Thin Films with Giant Interfacial Anisotropy”, Advanced Materials, 25, 1639-1645, 2013.
  3. S. N. Piramanayagam, B. Varghese, H. K. Tan, Hnin Yu Yu Ko, W. K. Lee, I. Okamoto, L. Wu, D. Tripathy, “Writability Improvement in Perpendicular Recording Media Using Crystalline Soft Underlayer Materials”, IEEE Transactions on Magnetics, 49 (2), 758-764, 2013.
  4. Y. J. Chen, T. L. Huang, J. Z. Shi, J. Deng, J. Ding, W. M. Li, S. H. Leong, B.Y. Zong, Hnin Yu Yu Ko, S. B. Hu, J. M. Zhao, “Individual bit island reversal and switching field distribution in perpendicular magnetic bit patterned media”, Journal of Magnetism and Magnetic Materials, 324, 264-268, 2012.
  5. Y. J. Chen, J. Ding, J. Deng, T. L. Huang, S. H. Leong, J. Z. Shi, B. Y. Zong, Hnin Yu Yu Ko, C. K. Au, H. Shengbin, B. Liu, “Switching Probability Distribution of Bit Islands in Bit Patterned Media”, IEEE Transactions on Magnetics, 46 (6), 1990-1993, 2010.
  6. Hnin Yu Yu Ko, W. Lu, N. T. Nam, N. N. Phuoc, and T. Suzuki, “Recent Developments of Nano-particles and Thin Films of FeRh and FeRh/ FePt with First Order Magnetic Phase Transition”, The Magnetic Society of Japan, 4 (4), 186-196, 2009.
  7. S. Inoue, Hnin Yu Yu Ko and T. Suzuki, “Magnetic Properties of Single-Crystalline FeRh Alloy Thin Films”, IEEE Transactions on Magnetics, 44 (11), 2875-2878, 2008.
  8. Hnin Yu Yu Ko, S. Inoue, N. T. Nam, T. Suzuki, and Y. Hirotsu, “Magnetic Properties of Nanocomposite Particles of FePt/FeRh”, IEEE Transactions on Magnetics, 44 (11), 2780-2783, 2008.
  9. Hnin Yu Yu Ko, T. Suzuki, N. T. Nam, N. N. Phuoc , J. Cao, and Y. Hirotsu, “Magnetic and structural characterizations on nanoparticles of FePt, FeRh and their composites”, Journal of Magnetism and Magnetic Materials, 320, 3120-3123, 2008.
  10. Hnin Yu Yu Ko, T. Suzuki, N. N. Phuoc, and J. Cao “Fabrication and characterization of FeRh nanoparticles”, Journal of Apply Physics, 103, 07D508, 2008.
  11. J. Cao, N. T. Nam, S. Inoue, Hnin Yu Yu Ko, N. N. Phuoc, and T. Suzuki “Magnetic behaviors for FeRh single crystal thin films”, Journal of Apply Physics, 103, 07F501- 07F501-3, 2008.
  12. S. Inoue, N. N. Phuoc, J. Cao, N. T. Nam, Hnin Yu Yu Ko, and T. Suzuki, “Structural and magneto-optical properties of FeRh thin films”, Journal of Apply Physics, 103, 07B312- 07B312-3, 2008.
  13. Hnin Yu Yu Ko, and T. Suzuki, “Synthesis and magnetic properties of self-organized FeRh nanoparticles”, Journal of Apply Physics, 101, 09J103- 09J103-3, 2007.
  14. Hnin Yu Yu Ko, and T. Suzuki, “Self-Assembly and magnetic properties of FePt, FeRh nanoparticles, and FePt/FeRh nanocomposite particles”, IEEE Transactions on Magnetics, 43 (2), 885-887, 2007.
  15. Hnin Yu Yu Ko, T. Suzuki, and A. K. Singh, “Perpendicular magnetic recording media (FePt-Fe3Pt)/MgO with tilted easy axis”, IEEE Transactions on Magnetics, 42 (10), 2354-2356, 2006.
  16. K. Singh, J. Yin, Hnin Yu Yu Ko, and T. Suzuki “Fabrication and characterization of granular-type FePt/Fe3Pt and FePt/fcc FePt tilted magnetic recording media”, Journal of Apply Physics, 99, 08E704- 08E704-3, 2006.
  17. Hnin Yu Yu Ko, M. Mizuhata, A. Kajinami, and S. Deki, “The dispersion of Au nanoparticles in SiO2/TiO2 layered films by the liquid phase deposition (LPD) method” Thin Solid Films, 491, 1-2, 86-90, 2005.
  18. Hnin Yu Yu Ko, M. Mizuhata, A. Kajinami, and S. Deki, “Preparation of Au nanoparticle dispersed Nb2O5 composite films by liquid phase deposition”, Journal of Electroanalytical Chemistry, 559, 91-98, 2003.
  19. Hnin Yu Yu Ko, M. Mizuhata, A. Kajinami, and S. Deki, “Fabrication of highperformance thin films from metal fluorocomplex aqueous solution by the liquid phase deposition”, Journal of Fluorine Chemistry, 120 (2), 157-163, 2002.
  20. Hnin Yu Yu Ko, M. Mizuhata, A. Kajinami, and S. Deki, “Fabrication and characterization of Pt nanoparticles dispersed in Nb2O5 composite films by liquid phase deposition”, Journal of Material Chemistry, 12, 1495-1499, 2002.
  21. S. Deki, Hnin Yu Yu Ko, T. Fujita, K. Akamatsu, M. Mizuhata, and A. Kajinami, “Synthesis and microstructure of metal oxide thin film containing metal nanoparticles by liquid phase deposition (LPD) method”, The European Physical Journal D, 16, 325-328, 2001.
  22. S. Deki, N. Yoshida, Hnin Yu Yu Ko, Y. Aoi, M. Mizuhata, and A. Kajinami, “Preparation of hetero-structured oxide thin films by the liquid-phase deposition (LPD)” Transactions of the Materials Research Society of Japan, 24(1), 55-58, 1999.



Last updated on : 05 Apr 2019 06:07 PM