Publications:

2014

57. Single Layer Graphene Hall Sensors for Scanning Hall Probe Microscopy (SHPM) in 3−300 K Temperature Range
S. Sonusen, O. Karci, M. Dede, S. Aksoy, A. Oral, accepted for publication in App. Surf. Sci. DOI #: 10.1016/j.apsusc.2014.04.191

2013

56. The Effects of Post-Deposition Annealing Conditions on Structure and Created Defects in Zn0.90Co0.10O Thin Films Deposited on Si(100) Substrate
Musa Mutlu Can, Tezer Fırat, S. Ismat Shah, Feray Bakan and Ahmet Oral
Journal of Materials Research, DOI:10.1557/jmr.2012.422

2011

55. Bean-Livingston surface barriers for flux penetration in Bi(2)Sr(2)CaCu(2)O(8+delta) single crystals near the transition temperature
V. Mihalache, M. Dede, A. Oral & M. Liu
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 471(19-20) 563-565(2011)

2010

54. Vortex phases in magnetic fields near ab-plane in Bi2Sr2CaCu2O8+d single crystal
Jovan Mirkovic´, Takashi Saito, Takanari Kashiwagi, Itsuhiro Kakeya, Yuimaru Kubo,
Takashi Yamamoto, Ahmet Oral and Kazuo Kadowaki
Physica C 470 S790–S792 (2010)

2009

53. Sub-Angstrom Oscillation Amplitude Non-Contact Atomic Force Microscopy for Lateral Force Gradient Measurement
M. Atabak, Ö. Ünverdi, H.Ö. Özer & A. Oral
Appl. Surf. Sci. 256, 1299-1303 (2009)

52. Vortex states in mesoscopic single crystals Bi2Sr2CaCu2O8+δ in high magnetic
fields
J. Mirkovic, Y. Kubo, T. Saitou, I. Kakeya, T. Yamamoto, A. Oral, K. Kadowaki
Physica C, 469, 1119–1121(2009)

51. High Sensitivity, Multi-Functional Micro-Hall Sensors Fabricated using InAlSb/InAsSb/InAlSb Heterostructures.
M. Bando, T. Ohashi, M. Dede, R. Akram, A. Oral, S. Park, M. Abe, H. Handa, I. Shibasaki and A. Sandhu
J. Appl. Phys. 105, 07E909(2009)

50. Imaging Capability of PHEMT, GaN/AlGaN and Si Micro Hall Probes for Scanning Hall Probe Microscopy between 25°C-125°C
R. Akram, M. Dede and A. Oral
J. Vac. Sci. Technol. B 27 ,1006 (2009)

49. Non-Contact Lateral Force Gradient Measurement with Small Amplitude Off-Resonance Atomic Force Microscopy
M. Atabak, Ö. Ünverdi, H.Ö. Özer & A. Oral
J. Vac. Sci. Technol. B 27, 1001 (2009)

2008

48. Variable Temperature-Scanning Hall Probe Microscopy (VT-SHPM) with GaN/AlGaN Two-Dimensional Electron Gas (2DEG) Micro Hall Sensors in 4-400K range, Using Novel Quartz Tuning Fork AFM Feedback.
R. Akram, M. Dede and A. Oral
IEEE Transactions on Magnetics, 44(11), 3255 (2008)

47. Vortex imaging with varying temperature revealed by SHPM on Bi2Sr2CaCu2O8+y
V. Mihalache, A. Oral, M. Dede , V. Sandu
Physica C, 468, 832-836 (2008)

46. Scanning Hall Probe Microscopy (SHPM) Using Quartz Crystal AFM Feedback
M. Dede, K. Ürkmen, Ö. Girisen, M. Atabak, A. Oral, I. Farrer and D. Ritchie
Journal of Nanoscience and Nanotechnology 8, 619-622 (2008)

2006

45. Solid or liquid? Solidification of a nanoconfined liquid under nonequilibrium conditions

Patil, G. Matei A. Oral and P.M. Hoffmann

Langmuir 22, 6485 (2006)

44. Real-Time imaging of Vortex-Antivortex Annihilation in BSCCO(2212) Single Crystals by
      Low Temperature Scanning Hall Probe Microscopy (LT-SHPM)
      M. Dede, A. Oral, T. Yamamoto, K. Kadowaki and H. Shtrikman
      Jap. J. Appl. Phys. 45(3B), 2246 (2006)

2005

43. A highly sensitive Atomic Force Microscope for linear measurements of molecular
      forces in liquids
      Shivprasad Patil, George Matei, Hang Dong, Peter M. Hoffmann, Mustafa Karaköse
       and Ahmet Oral
      Rev. Sci. Inst. 76, 103705 (2005)

2004

42. Comparison of magneto-optical imaging with other local magnetic probes
S.J. Bending , A. Brook , J. K. Gregory, Crisan IA, A. Pross, A. N. Grigorenko, A. Oral, F.

Laviano, E. Mezzetti MAGNETO-OPTICAL IMAGING Book Series: NATO SCIENCE SERIES, SERIES

II: MATHEMATICS, PHYSICS AND CHEMISTRY , 142 , 11-18 (2004)

41. Direct measurement of molecular stiffness and damping in confined water layers

      Steve Jeffery, Peter M. Hoffmann, John B. Pethica, Chandra Ramanujan, H. Özgür Özer,
      Ahmet Oral
      Phys. Rev. B. 70(5) 054114 (2004)

40. Nano and micro Hall-effect sensors for Room-Temperature Scanning Hall
      Probe Microscopy
      A. Sandhu , A. Okamoto, I. Shibasaki and A. Oral
      Microelectronic Engineering, 73-74, 524 ( 2004)

39. Low-amplitude, force gradient imaging of Cu(100) surface using tunnel current feedback
H. Ö. Özer, A. Norris, A.Oral , P.M. Hoffmann and J.B.Pethica
Nanotechnology(15) S5-S8, 2004.

38. 50nm Hall Sensors for Room Temperature Scanning Hall Probe Microscopy

Sandhu, K. Kurosawa, M. Dede, A. Oral

Jap. J. Appl. Phys. 43, 777 (2004)

2003

37. Integrated Piezoresistive Sensors for Atomic Force - Guided Scanning Hall Probe Microscopy

A.J. Brook, S. J. Bending, J. Pinto, A. Oral, D. Ritchie, H. Beere, M. Henini, and

A.Springthorpe
Appl. Phys. Lett. 82(20), 3538-3540 (2003)

36. Room Temperature Scanning Micro-Hall Probe Microscopy under Extremely Large Pulsed

Magnetic Fields
Adarsh Sandhu, Hiroshi Masuda and Ahmet Oral

IEEE Transactions on Magnetics. 39 (5) 3462-3464 (2003)

35. High-sensitivity noncontact atomic force microscope/scanning tunnelling microscope (nc    AFM/STM) operating at subangstrom oscillation amplitudes for atomic resolution imaging and force spectroscopy
      A.Oral, R.A.Grimble, H. Ö. Özer and J.B. Pethica
      Rev. Sci. Inst. 84(8) 3656-3663 (2003)

34. Measurement of Energy dissipation between Tungsten tip and Si(100)-(2 1) using
      sub-Angstrom oscillation amplitude non-contact Atomic Force Microscope (nc-AFM)
      H. Özgür Özer, Mehrdad Atabak, Ahmet Oral
      Appl. Surf. Sci. 210(1-2), 12-17, (2003)

33. Micromachined III-V cantilevers for AFM-tracking scanning Hall probe microscopy
J. Brook, S. J. Bending, J. Pinto, A. Oral, D. Ritchie, H. Beere, A. Springthorpe, and
M. Henini,

J. Micromech. Microeng. 13(1) , 124-128, (2003)

2002

32. Magnetic imaging of ferromagnetic domains by room temperature scanning hall probe

       microscopy using GaAs/AlGaAs and bismuth micro-hall probes
      A. Sandhu, H. Masuda, A. Oral , S.J. Bending, T. Inushima
      PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION

ENGINEERS (SPIE) 4746 , 950-955 (2002 )

31. Room Temperature Scanning Micro-Hall Probe Microscope Imaging of Ferromagnetic

Microstructures in the Presence of 2.5 Tesla Pulsed Magnetic Fields Generated by an

Integrated Mini Coil

Adarsh Sandhu, Hiroshi Masuda and Ahmet Oral

Japanese Journal of Applied Physics, 41, L1402-L1405 (2002).

30. Ultra-small oscillation amplitude nc-AFM/STM imaging, force and dissipation
      spectroscopy of Si(100)(2´1)
      H. Özgür Özer, Mehrdad Atabak and Ahmet Oral
      Solid State Communications 124, 469-472 (2002).

29. Room Temperature Scanning Hall Probe Microscope(RT_SHPM) Imaging of Garnet Films Using New High Performance InSb Sensors
A. Oral, M. Kaval, M. Dede, H. Masuda, A. Okamoto, I. Shibasaki and A. Sandhu
IEEE Transactions on Magnetics. 38 (5), 2438-2440 (2002).

28. Room temperature scanning Hall probe microscopy using GaAs/AlGaAs and
Bi micro-Hall probes
A. Sandhu, H. Masuda, A. Oral, S.J. Bending, A. Yamada and M. Konagai
Ultramicroscopy 91, 97-101(2002).

27. Room temperature scanning Hall probe microscopy of localized magnetic field fluctuations
      on the surfaces of magnetic recording media, permanent magnets and crystalline garnet films
      in external bias fields
      A. Sandhu, N. Iida, H. Masuda, A. Oral, S.J. Bending
      J. Magn. Magn. Mater. 242, 1249-1252, (2002).

26. Simultaneous non-contact Atomic force microscopy (nc-AFM)/STM Imaging and Force    Spectroscopy of Si(001)(2x1) with small oscillation amplitudes.
      H. Ö. Özer, M. Atabak , R. E. Ellialtioglu and A. Oral
       Appl. Surf. Sci. 188, 301-305,(2002).

2001

25.Energy Dissipation in Atomic Force Microscopy and Atomic Loss Processes
Peter M. Hoffmann, Steve Jeffery, John B. Pethica, H. Özgür Özer, Ahmet Oral
Phys. Rev. Lett. 87, 265502 (2001).

24.Bismuth nano-Hall probes fabricated by focused ion beam milling for direct
     magnetic imaging by room temperature scanning Hall probe microscopy
     A. Sandhu, H. Masuda, K. Kurosawa K, A. Oral and S.J. Bending
     Electronics Letters 37 (22), 1335-1336 (2001).
23.Quantitative atom-resolved force gradient imaging using non contact atomic force microscopy
     A.Oral, R.A.Grimble, H. Ö. Özer, P.M. Hoffmann and J.B.Pethica
     Appl. Phys. Lett. 79, 1915-1917 (2001)
22.Room Temperature Magentic Imaging of Magnetic Storage media and Garnet Epilayers in the Presence of External Magnetic Fields using a sub-micron GaAs SHPM.
     Adarsh Sandhu, Hiroshi Masuda , Ahmet Oral and Simon J. Bending
     Journal of Crystal Growth, 227/228, 899-905 (2001)

21.Room Temperature Sub-Micron Magnetic Imaging by Scanning Hall probe Microscopy
     Adarsh Sandhu, Hiroshi Masuda, Ahmet Oral and Simon J. Bending
     Japanese Journal of Applied Physics, 40, 4321-4324(2001).
20.Direct Magnetic Imaging of Ferromagnetic Domain Structures by Room Temperature
     Scanning Hall Probe Microscopy Using a Bismuth Micro-Hall Probe
     Adarsh Sandhu, Hiroshi Masuda, Ahmet Oral and Simon J. Bending
     Jpn. J. Appl. Phys. Vol. 40 L524-L527 Part 2, No. 5B(2001)
19.Direct measurement of interatomic force gradients using an ultra-low amplitude atomic force   microscope
     P.M. Hoffmann, A. Oral, R.A.Grimble, H. Ö. Özer S. Jeffery and J.B.Pethica
     Proc. of Royal Soc. A. 457, 1161 (2001).

2000

18.Collective modes in flux line liquids.
     B. Tanatar and A. Oral
     Superconductor Science and Technology 13, 968-970 (2000).
17.Quantitative Electrostatic Force Measurement in AFM
     Steve Jeffery, Ahmet Oral and John B. Pethica
     Applied Surface Science, 157, 280-284 (2000)
16.Manipulation of atoms across a surface at room temperature
     T.W. Fishlock, A. Oral, R.G. Egdell and J.B. Pethica
Nature 404, 743-745 (2000)

1999

15.Direct observation of vortex lattice melting in Bi2Sr2CaCu2O8+d single crystals
     S.J. Bending, A. Oral, J.R. Clem, I.I. Kaya, S. Ooi, T. Tamegai, M. Henini
     IEEE Transactions On Applied Superconductivity, 9, 1820-1823(1999)
14.Interaction of bromine with Ni(110) studied by scanning tunnelling microscopy
     T.W. Fishlock, J.B. Pethica, A. Oral, R.G. Egdell and F.H. Jones
     Surf. Sci., 426, 212-224 (1999)
13.Scanning Hall probe microscopy of ferromagnetic structures
     G.D. Howells, A. Oral, S.J. Bending, S.R. Andrews, P.T Squire, P. Rice,
     A. de Lozanne, J.A.C. Bland, I. Kaya and M. Henini
     J. Magn. and Magn. Mat., 197, 917-919 (1999)

1998

12.Microscopes get to the point
     A. Oral
     Physics World, 11, 26(1998).
11.Direct Observation of Melting of the Vortex Solid in Bi2Sr2CaCu2O8+d Single Crystals
     A.Oral, J.C.Barnard, S.J.Bending, I.I.Kaya, S.Ooi, H.Taoka, T.Tamegai and M.Henini.
     Phys. Rev. Lett. 80, 3610-3613 (1998).

1997

10.Disorder-driven “Intermediate” State in the Lattice Melting Transition of
   Bi2Sr2CaCu2O8+d Single Crystals
   A.Oral, J.C.Barnard, S.J.Bending, S.Ooi, T.Tamegai and M.Henini.
   Phys. Rev. B. Rapid Communications 56, R14295-14298 (1997).
9.Hall Effect in a highly inhomogeneous Magnetic Field Distribution
   S. J. Bending and A. Oral.
   J. Appl. Phys. 81, 3721-3725 (1997).

8.Microscopic Measurement of Penetration depth in YBa2Cu3O7-d
   Thin Films by Scanning Hall Probe Microscopy
   A. Oral, S. J. Bending, R.G. Humphreys and M. Henini.
   Superconductor Science and Technology 10, 17-20 (1997).

1996

7.Vortex imaging in superconducting films by Scanning Hall Probe Microscopy
   A. Oral, S. J. Bending, R.G. Humphreys and M. Henini.
   J. Low Temp. Phys. 105, 1135-1140 (1996).
6.Real-time Scanning Hall Probe Microscopy
   A. Oral, S. J. Bending and M. Henini.
   Appl. Phys. Lett., 69, 1324-1326 (1996).
5.Scanning Hall Probe Microscopy of Superconductors and Magnetic Materials
A. Oral, S. J. Bending and M. Henini.
J. Vac. Sci. & Technol. B., 14, 1202-1205(1996).

1995

4.Initial stages of SiGe epitaxy on Si(001) studied by scanning tunneling microscopy.
A. Oral and R. Ellialtioglu.
Surf. Sci., 323, 295-303 (1995).

1993

3. Mechanics of Contacts at Less Than 100Å Scale: Indentation and AFM.
   S. P. Jarvis, T. P. Weihs, A. Oral and J. B. Pethica.
   Thin Films-Stresses and Mechanical Properties IV,
   Mater. Res. Soc. Proc. 308, 127-132 (1993).

2.A Novel Force Microscope and Point Contact Probe
S. P. Jarvis, A. Oral, T. P. Weihs and J. B. Pethica.
Rev. Sci. Instrum., 64, 3515-3520 (1993).

1.STM of Glow Discharge Treated Surfaces
A. Oral, A. I. Serbetci, R. Ellialtioglu and E. Piskin.
Biomaterials, Artificial Cells and Immobilisation Biotechnology 21, 469-473 (1993).

Chapters in Books:

2007

· Scanning Hall Probe Microscopy: Quantitative & Non-Invasive Imaging and Magnetometry of Magnetic Materials at 50nm scale

Ahmet Oral, Magnetic Nanostructures, Springer Verlag, pp. 7-14, 2007.
Editors : B. Aktaş, L.R. Tagirov, F. Mikailov

Other Publications:

2005

· Linear measurements of nano-mechanical phenomena using small-amplitude AFM
P. M. Hoffmann, S. Patil, G. Matei, A. Tanulku, R. A. Grimble, H. Ö.Özer, S. Jeffery, A. Oral, and John B. Pethica, to appear in Mat. Res. Soc. Proc. 2005.

2004

· Scanning Hall Probe Microscopy: Quantitative & Non-Invasive Imaging and Magnetometry of Magnetic Materials at 50nm scale
Proceedings of The 12th Academic Frontier Center Workshop, The 4th Aichi Science and Technology, Foundation Meeting, December 12, 2003 Nagoya, Japan

2001

· Magnetic Imaging of Ferromagnetic domains by room temperature scanning Hall
   probemicroscopy using GaAs/AlGaAs and bismuth micro-Hall probes
   A.Sandhu, A. Oral, H. Masuda, and S.J. Bending.
   Accepted for publication in The Proceedings of 11th International Workshop on the Physics of
   Semiconductor Devices.

· State of the art room temperature scanning Hall probe microscopy using high performance
   micro-Hall probes
   A. Sandhu, A. Oral, H. Masuda, and S.J. Bending.
   Proceedings of the 8th International Symposium on Quantum Effect Electronics, Tokyo
   Institute of Technology, Tokyo, October 12th, 2001, pp. 31-15, 2001
· Nanomechanics Using an Ultra-Small Amplitude AFM
   Peter M. Hoffmann, Steve Jeffery, Ahmet Oral , Ralph A. Grimble, H. Özgür Özer and
   John B. Pethica
   Mater. Res. Soc. Proc. 649, Q9.2 (2001).

· Direct and Real-Time observation of Sub-micron Domain Dynamics in Magnetically Biased
   Strontium Ferrite Permanent Magnets by Room Temperature Scanning Micro-Hall Probe
   Microscopy
   Adarsh Sandhu, Naoji Iida, Hiroshi Masuda, Ahmet Oral and Simon J. Bending
   Mater. Res. Soc. Proc. Accepted for publication

· Room Temperature Scanning Hall Probe Microscopy in External Fields
   Adarsh Sandhu, Hiroshi Masuda , Ahmet Oral and Simon J. Bending
   J. Magn. Soc. Japan, 25, 1063-1066 (2001)
· RT-Magnetic Imaging of Micron Sized Ferromagnetic Domains using a SHPM
   A. Sandhu, A. Oral, H. Masuda, and S.J. Bending
   Proceedings of the 8th Asia-Pacific Physics Conference, pp. 627-629, 2001.
· Room Temperature Imaging of Magnetic Domains in Storage Media in the presence of
   External Magnetic Fields by SHPM
   Adarsh Sandhu, Hiroshi Masuda, Y. Otsuka, Ahmet Oral and Simon J. Bending
   Proceedings of the Eighth International Conference on Ferrites, Kyoto, 2000, pp. 390-392

1997

· Vortex Lattice Melting in Bi2Sr2CaCu2O8+d
Single Crystals: Insights from Scanning Hall Probe Microscopy.
A. Oral, J. C. Barnard, S. J. Bending, I. I. Kaya, S. Ooi, H. Taoka,
T. Tamegai, and M. Henini.
Proceedings of 10th International Symposium on Superconductivity ISS’97, Gifu, Japan, 27-30 October 1997.

1992

· A Compact and Modular Scanning Tunneling Microscope
A. Oral, I. I. Kaya and R. M. Ellialtioğlu
Doğa, Turk. J. of Phys. 16, 400-404 (1992).