Dr. K. Syed Ali

Dr. Syed Ali Kalangala Sikkanther,  M.Sc., M.Phil., Ph.D.


Science Teacher, Harmony Science Academy
Address: 12005 Forestgate Dr, Dallas, TX - 75243, USA
Phone: 214.954.7277 ext. 3129 | Fax: 972.954.7993

Research topic: 

Growth, Structural and Physical characterization of some diluted magnetic semiconduct0r (DMS) materials.

Ph.D. Registration: MKU, Reg. No.: 3464, Dt. 24/08/2005

Viva Voce examination completed on: 23/06/2011

About the Research work:

The last two decades were showing an inspiringly fast development in the field of magnetism, essentially initiated by the application of magnetic storage devices in information technology. The breathtaking evolution of this revolutionizing technology is characterized by a sustained miniaturization tendency and it inspired intense research on the diluted magnetic materials. These scientific results have accelerated the technological innovation even more up to the present time. From this mutual stimulation of basic research and technological application, a rich variety of novel experimental techniques and stunning scientific discoveries have evolved. Most of these phenomena and applications are connected to magnetic properties of interfaces or systems with strongly reduced spatial dimensions, which show significant deviations from the well-known bulk magnetic behavior of the applied materials. A reduction of the spatial extension causes a strict cut-off of the various magnetic interactions acting at different length scales. Therefore, a reduced dimensionality allows tuning the magnetic properties of a system and thereby offers interesting technological perspectives. Consequently, the challenge for the future is to understand and control the magnetism on very small length and time scales. For these reasons, the study and the depth analysis of magnetic materials especially diluted magnetic semiconductor (DMS) has become a fascinating field in basic condensed-matter research. The development of spintronics devices, in particular the application of the giant magneto-resistance and exchange-bias effects has led to a renewed interest in magnetic semiconductors.

Samples studied:

1. Si,

2. Ge,

3. Ge1-xMnx (x = 0.03 and 0.07),

4. Zn1-xCoxO (x = 0.01: Annealing temperature, T = 500°C, 600°C, 700°C, 800°C and 900°C),

5. Zn1-xNixO (x = 0.01, 0.02, 0.03, 0.04 and 0.05),

6. La0.67Sr0.22Mn1.11-xCoxO3 (x = 0.0, 0.02, 0.05, 0.2 and 0.3)

List of research articles Published
1. Electron density distribution in Si and Ge using multipole, MEM and pair    distribution function
R. Saravanan, K. S. Syed Ali and S. Israel
Pramana journal of physics (Indian Academy of Sciences)., 70-4 (2008) 679.                       Impact Factor: 0.56
2. Growth of novel diluted magnetic semiconducting material Ge1-xMnx and X-ray    characterization by Maximum Entropy Method (MEM) and Pair Distribution Function    (PDF)
K. S. Syed Ali, R. Saravanan and S. Israel
Journal of Crystal Growth (Elsevier)., 311 (2009) 1110–1116.Impact Factor: 1.742
3. Localized ferromagnetic charge ordering through charge density analysis in nano    sized diluted magnetic semiconductor Co2+:ZnO
K. S. Syed Ali, R. Saravanan, S. Israel and M. Açıkgöz
Physica B (Elsevier)., 405 (2010) 1763–1769. Impact Factor: 1.453
4. Local distortion in Co doped LSMO from entropy maximized charge density    distribution
K. S. Syed Ali, R. Saravanan, A. V. Pashchenko and V. P. Pashchenko
Journal of Alloys and Compounds (Elsevier)., 501 (2010) 307-312. Impact Factor: 3.779
5. XRD analysis of the local structure in diluted magnetic semiconductor Zn1-xNixO
Crystal Research and Technology (Wiley), Volume 46, Issue 1
05 November 2010.  Impact Factor: 1.0

K. S. Syed Ali, R. Saravanan and M. Açıkgöz
6. Analysis on experimental valence charge density in Germanium at RT and 200 K
S. Israel, K. S. Syed Ali, R.A.J.R. Sheeba and R. Saravanan
Journal of Physics and Chemistry of Solids., 70 (2009) 1185–1194. Impact Factor: 2.14
7. X-ray analysis of charge density distribution in GaP at 296 and 200K using    Multipole and MEM models.
S. Israel, K. S. Syed Ali, R. A. J. R. Sheeba and R. Saravanan
Chinese Journal of Physics., 47 (3) (2009) 378-400. Impact Factor: 1.051
8. X-Ray Characterization of Ag Impurities in Na1-xAgxCl
Nizarul Hazeen, K. S. Syed Ali, M. Prema Rani and R. Saravanan
Defect and Diffusion Forum., 278 (2008) 33.
9. Electron density distribution and bonding in ZnSe and PbSe using Maximum
Entropy Method
K. S. Syed Ali, R. Saravanan, S. Israel, and R. K. Rajaram
Bulletin of material science., 29 (2) (2006) 107- 116. Impact Factor: 0.925
10. Gel growth and X-ray Characterization of ferro-electric single crystals of     SrHPO4 and PbHPO4
K. S. Syed Ali, N. Ajeetha and R. Saravanan.
Bulletin of pure and applied sciences D: Physics., 21D (2) (2002) 151-157.

List of papers presented in conferences/symposia/seminars

1. Presented a paper “Bonding in Diluted Magnetic Semiconductor (DMS) Zn0.99Co0.01O”  at National seminar on Advances in Materials Science (NSAMS) by Department of Physics, Manonmaniam Sundaranar University Tirunelveli -627 012, from 16-17/03/2009.
K. S. Syed Ali, R. Saravanan, Muhammed Açıkgöz and Lutfi Arda
OP 17 - Page No: 64
2. Presented a paper “Growth and electronic structure analysis in Ge and Ge0.95Mn0.05” at International conference on Active/Smart Materials by Thiyagarajar College of Engineering Madurai 625 015, from 7-9/01/2009.
K. S. Syed Ali and R. Saravanan
(SMART -297) S.No:53
3. Presented a paper “Electronic structure of nano sized Cd1-xMnxS from experimental charge density” at International conference on Active/Smart Materials by Thiyagarajar College of Engineering Madurai 625 015, from 7-9/01/2009.
S. Israel, K. S. Syed Ali, R.A.J.R. Sheeba, P. Sathyasree and R. Saravanan (SMART -346) S.No:87
4. Presented a paper “X-ray characterization of local structure in the magnetic semiconductor Zn1-xNixO”  at National seminar on crystal growth of Laser and non liner optical materials (NSCGOM) by PG & Research Department of physics, National College, Trichirappalli – 620 001, from 25-26/09/2008.
K. S. Syed Ali and R. Saravanan (OP31)
5. Presented a paper “Growth of novel diluted magnetic semiconducting material Ge1-x Mnx and X-ray characterization by Maximum Entropy Method (MEM) and Pair Distribution Function (PDF)” at International conference on Materials Science Research and Nanotechnology (ICMSRN) by Mother Teresa Women’s University, Kodaikanal – 624 101, from 27-29/02/2008.
K. S. Syed Ali and R. Saravanan
ICMSRN – 2008 Page no: 203
6. Presented a paper “Structural analysis of ZnS by Maximum Entropy Method (MEM) using powder X-ray data” at International conference on Materials Science Research and Nanotechnology (ICMSRN) by Mother Teresa Women’s University, Kodaikanal – 624 101, from 27-29/02/2008.
S. Jainulabdeen, K.S. Syed Ali, R. Saravanan and C. Gopinathan
ICMSRN – 2008 Page no: 331
7. Presented a paper “X-ray characterization of solar energy material Cu1.8Se by MEM technique” at National seminar on crystal growth of Laser and non liner optical materials (NSCGOM) by PG & Research department of physics, National College, Trichirappalli – 620 001, from 25-26/09/2008.
S. Jainulabdeen, K.S. Syed Ali and R. Saravanan (OP32)
8. Presented a paper “Debye-Waller factors from phonon density of states” at National seminar on crystal growth of Laser and non liner optical materials (NSCGOM) by PG & Research department of physics, National College, Trichirappalli – 620 001, from 25-26/09/2008.
S. Israel, S. Senthil Kumar, R.A.J.R. Sheeba and K.S. Syed Ali (OP38)
9. Presented a paper “Growth and characterization of Mn Doped ZnSnSb2single crystals” at National seminar on crystal growth of Laser and non liner optical materials (NSCGOM) by PG & Research department of physics, National College, Trichirappalli – 620 001, from 09/25-26/2007.
S. Israel, M. Parameshwari, S. Senthil Kumar, R.A.J.R. Sheeba and K.S. Syed Ali (OP39)
10. Presented a paper “Synthesis and characterization of Cd1-xMnxS nano crystals” at National seminar on crystal growth of Laser and non liner optical materials (NSCGOM) by PG & Research department of physics, National College, Trichirappalli – 620 001, from 09/25-26/2007.
S. Israel, P. Sathyashree, S. Senthil Kumar, R.A.J.R. Sheeba and K.S. Syed Ali (OP40)
11. Presented a paper “Multipole and MEM analyses of the electronic charge distribution in Germanium at RT and 200K”  at 12th  National seminar on crystal growth by Centre for crystal growth, SSN College of Engineering, SSN Nager – 603 110, Tamil Nadu. from 12/21 - 23/2007.
S. Israel, K. S. Syed Ali and R. Saravanan (P17)
12. Presented a paper “Experimental electron density in GaP at RT and 200K from single crystal X-ray data” at 12th National seminar on crystal growth by Centre for crystal growth, SSN College of Engineering, SSN Nager – 603 110, Tamil Nadu. from 12/21 - 23/2007.
S. Israel, K. S. Syed Ali, R.A.J.R. Sheeba and R. Saravanan (P17)
13. Presented a paper “Comparative structural analysis of as grown Si and solar grade Si by maximum entropy method (MEM) using powder X-ray data” at National seminar on emerging trends in physics, department of physics, Jayaraj Annapackiam college for women (Autonomus), Periyakulam , Tamil Nadu - 625601. from 09/30 - 31/2007.
S. Jainulabdeen, K.S. Syed Ali, R. Saravanan and C. Gopinathan
OP 6 page No: 22
14. Presented a paper on True electron density distribution using MEM in the National Seminar on Emerging Trend in Physics. Organized by Arul Anander College, Madurai – 625 514, India. From 09/23-24/2005.
K.S. Syed Ali and R. Saravanan
15. Presented a paper on Local structure of GaAs and Ge Using Pair Distribution Function at National conference on Current trends in condensed Matter Research, held at Department of Physics. University Arts & Science College, Kakatiya University, Warangal-506 001, India on 09/ 20-22/2004.
16. Participated in the Regional seminar on Condensed Matter Physics at Department of Physics, Yadava College, Madurai - 625 014, India, on 02/22-23/2006.
17. Participated in the National Workshop on Principles and Practice of the Powder X-ray diffraction. Organized by Central Electrochemical Research Institute (CECRI), Karaikudi – 630 006, India. From 03/30/2005 -  04/02/2005.
18. Presented a paper X – ray characterization of gel grown Ferro electric single crystals of SrHPO4 and PbHPO4  at 32nd National seminar on crystallography organized by University of Jammu, Jammu Tawi, Jammu - 180001, from 10/24 - 26/2002.
19. Presented a paper Growth and X – ray characterization of carbonates of Barium Strontium and Calcium in gel medium at 32nd National seminar on crystallography organized at University of Jammu, Jammu Tawi, Jammu – 180001, from 10/24 - 26/2002.
20. Attended a seminar on Computer Simulation in Physics (SCSP-2002) organized by School Of Physics, Madurai Kamaraj University, Madurai -625 021, India, From 02/04-05/2002.

Viva-Voce photos