The neighbours have a refrigerator that’s guarded 24×7 by a grad student in spite of the fact that there never is any ice cream in it. It can cool its contents to around 10mK , subject to heat load . Designed by Oxford Instruments, this dilution refrigerator uses a mixture of He-4 and its isotope […]
Posts in category Masters Research
An Introduction to the MFP-3D AFM installed at the SpinLab, IISER Mohali. I have Co-Authored a paper on the surface topography of moth wings imaged with this AFM, which includes a discussion on the relevance of the discovered patterns in the flight of winged insects. It appeared in Applied Physics Letters http://scitation.aip.org/content/aip/journal/apl/104/6/10.1063/1.4865202 and the the […]
Contacts between conductors can be classified based on their radius , and the smallest radius possible for a conducting pathway is limited by the de-Broglie wavelength of the electron (Topinka 2000). Electrons flowing through conductors wider than the mean free path routinely undergo scattering by phonons and other elementary excitations, but the current-voltage characteristics of […]
A pictorial walkthrough of the installation of the He-4 based Cryostat at the SpinLab, IISER Mohali. This cryostat is equipped with a 3-axis vector magnet and a dynamic VTI capable of cooling samples down to 2 Kelvin. Special care has been taken to isolate this American Magnetics designed cryostat from ground as well as acoustic […]
A documented wild goose chase of attempting to produce thin films of sodium irridate using Pulsed Laser Deposition and characterizing surface topography with the Atomic Force Microscope. Towards the end of this process, a scanning electron microscope with EDS was installed. The EDS data revealed that the thin films produced were actually IrO3.
Part of my thesis work involved developing a room temperature prototype of a scanning tunneling microscope(STM). Please refer to the full text of my thesis for a more elaborate write-up. The STM was used to study the structure of Highly ordered pyrolytic graphite(HOPG) at room temperature, and monolayer steps were imaged. The thickness of each […]
An introduction to some of the thin film deposition equipment and materials I have worked with! Overview of the vacuum chamber at the Spin-lab, IISER Mohali. During my time at the Spin-Lab at IISER Mohali, one multi-purpose vacuum chamber designed by Excel Instruments was dedicated for thin film deposition. The system was custom built in […]