Meissner state of high-T[sub c] oxide thin films observed by scanning superconducting quantum interference device microscopy

Iguchi, I.; Takeda, T.; Sugimoto, A.; Imaizumi, T.; Haibara, H.; Kawai, T.
September 2003
Applied Physics Letters;9/15/2003, Vol. 83 Issue 11, p2193
Academic Journal
The magnetic level of the Meissner state in high-T[sub c] oxide thin films is investigated using scanning superconducting quantum interference device microscopy. We find that the Meissner level observed is not uniquely determined and shifts with the temperature and depends on the doping level of individual oxide films. The result at higher temperature may be interpreted by a grain-coupled model which reflects the granular nature of high-T[sub c] oxides and is useful for evaluation of high-T[sub c] film quality. © 2003 American Institute of Physics.


Related Articles

  • Bulk BiPbSrCaCuO rf SQUIDs operating up to 101 K. Zhang, Yi; Xu, Yunhui; Heiden, C. // Applied Physics Letters;4/16/1990, Vol. 56 Issue 16, p1579 

    rf superconducting quantum interference devices (SQUIDs) of bulk Bi1.4Pb0.6Sr2Ca2Cu3Ox samples have been fabricated using an adjustable break junction and operated from 4.2 to 101 K. An adjustable break junction is used as weak link whose critical current can be varied to obtain the optimum...

  • Development of High Tc Superconducting Quantum Interference Devices. Vaidhyanathan, L. S.; Baisnab, D. K.; Janawadkar, M. P. // AIP Conference Proceedings;7/16/2011, Vol. 1349 Issue 1, p463 

    SQUID sensors based on High Temperature Superconductors (HTS) have been designed and fabricated. The devices were fabricated using highly reliable advanced micro-fabrication techniques such as deposition of superconducting thin films by Pulsed Laser Deposition (PLD), UV photolithography and RF...

  • Quantum interference devices made from superconducting oxide thin films. Koch, R. H.; Umbach, C. P.; Clark, G. J.; Chaudhari, P.; Laibowitz, R. B. // Applied Physics Letters;7/20/1987, Vol. 51 Issue 3, p200 

    We have fabricated superconducting quantum interference devices (dc SQUID’s) from thin films of the superconducting oxide YBa2Cu3Oy. The devices were made by first lithographically patterning an ion implant mask containing a 40 by 40 μm loop and two 17-μm-wide weak links over a...

  • Operation of a Y-Ba-Cu-O rf SQUID at 81 K. Zimmerman, J. E.; Beall, J. A.; Cromar, M. W.; Ono, R. H. // Applied Physics Letters;8/24/1987, Vol. 51 Issue 8, p617 

    An rf superconducting quantum interference device (SQUID) has been made from bulk Y-Ba-Cu-O. The device displays quantum interference effects and operates with useful signal levels up to 81 K. The SQUID is formed from a ring of Y-Ba-Cu-O which is broken in the cryogenic environment and then...

  • Bulk dc SQUID in a Tl-based ceramic: Shapiro steps, signal, and noise properties at 77 K. Robbes, D.; Sing, M. Lam Chok; Monfort, Y.; Bloyet, D.; Provost, J.; Raveau, B. // Applied Physics Letters;3/20/1989, Vol. 54 Issue 12, p1172 

    The current-voltage characteristic at 77 K of a constricted thallium-based high Tc superconducting sample exhibits Shapiro steps and is modulated by a dc magnetic field. This device operates as a dc superconducting quantum interference device with a maximum critical current Ic of 350 μA, a...

  • A low field SQUID magnetometer system for magnetic characterization of high-Tc superconducting samples. Vandervoort, K. G.; Griffith, G.; Claus, H.; Crabtree, G. W. // Review of Scientific Instruments;Sep91, Vol. 62 Issue 9, p2271 

    In this article we describe a simple SQUID magnetometer system useful for the magnetic characterization of high temperature superconductors. The system employs a commercial rf SQUID probe with associated electronics located in a 4He gas exchange cryostat. The system is equipped with a copper...

  • Improved system for measurement of the magnetization characteristics of high-temperature superconductors by the compensation method in weak magnetic fields. Zrubec, Vladimír // Review of Scientific Instruments;Jun2001, Vol. 72 Issue 6, p2653 

    This article follows the previous publication (1999) of the author where the theoretical sensitivity limits and the basic analysis of the parameters of the superconducting quantum interference device systems for measurement of the magnetization characteristics of high-temperature (HT[sub c])...

  • Low-frequency noise reduction in YBa[sub 2]Cu[sub 3]O[sub 7-δ] superconducting quantum interference devices by antidots. Selders, P.; Wo¨rdenweber, R. // Applied Physics Letters;5/29/2000, Vol. 76 Issue 22 

    It is demonstrated that the low-frequency noise due to vortex motion in high-temperature superconducting quantum interference devices (SQUIDs) in ambient magnetic fields can strongly be reduced by a simple arrangement of antidots patterned into the SQUID. Sputter-deposited YBa[sub 2]Cu[sub...

  • Nuclear magnetic resonance using a high temperature superconducting quantum interference device. Kumar, S.; Matthews, R. // Applied Physics Letters;2/24/1997, Vol. 70 Issue 8, p1037 

    Presents study results on the detection of nuclear magnetic resonance signals using an untuned pickup coil coupled to a high temperature superconductor-based superconducting quantum interference device. Operation of the device in the presence of static fields up to 500 Gauss; Efficacy of the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics