Click here

Facilities


TYChen Lab Fabrication Systems

We have three ultra-high vacuum (UHV) home-built fabrication systems and they are connected with each other. Hybrid samples with different layers can be grown by different techniques without breaking vacuum. There is vacuum glovebox for field annealing of samples with home-built magnetic field in parallel and perpendicular directions.

- Fab1: UHV sputtering system

- Fab2: High temeprature sputtering and ion milling system

- Fab3: UHV molecular beam epitaxy (MBE)

- PostTreat1: Vacuum glovebox for field or reactive annealing


Fab1 system

Fab1: home-built UHV sputtering systems


- 10 home-built UHV sputtering sources at bottom

- 6 home-built UHV sources on top

- Depostion controlled by Labview

- Reactive sputtering and cosputtering

- Heated substrates to be installed

- Base pressure 5.0E-9 torr without baking

...

Fab2 system

Fab2: home-built sputtering and ion milling systems


- 4 home-built UHV sputtering sources at bottom

- Reactive sputtering and cosputtering

- Heated substrates to be installed

- Base pressure 5.0E-9 torr without baking

...

Fab3 system

Fab3: UHV molecular beam epitaxial system


- 6 sources in co-deposition configuration

- Substrate from RT - 1000C

- Base pressure: 3.0E-10 torr

treat1 system

PostTreat1: Vacuum glovebox for field or reactive annealing


- Field annealing in parallel and perpendicular fields

- O2 or N2 annealing at 500 C

**_**

TYChen Lab Characterization Systems

To characterize our samples and devices, we measure structural, magnetic and transport properties at various temperatures. Here are a few major facilities at the TYChen lab.

- Andreev reflection spectroscopy (ARS)

- Magnetotranport system (MTS)

- Magnetic probe station (MPS)

- Viberating sample magnetometer (VSM)



ARS system

Andreev reflection spectroscopy (ARS)


- Temperature: 1.5K - 400 K, 100 mK with extra option

- Vector magnetic field: 3D, 3.5T

- Magnetic field: 9T in z direction

- Two schemes for differential resistance measurement

- V/I and dV/dI measured at the same time

...

MTS system

Magnetotransport system (MTS)


- Temperature: 4.5K - 300 K, Cryogen-free

- Rotating magnetic field: 1T

- Room temeprature thermal experiments

- V/I and dV/dI measured at the same time

...

MPS system

Magnetic probe station (MPS)


- Room temperature

- 5 probes

- Magnetic field: 0.2T

- Rotating field

- V/I and dV/dI measured at the same time

...

ARS system

Viberating Sample Magnetometer (VSM)


- Lakeshore 7304

- Field: -14.5kOe - +14.5kOe (gap 2.3cm), 10kOe @1.6" gap

- Moment: 5E-6 emu

- Temperature: Room temeprature to 1000K

...

Other General Lab Tools

Gaussmeter, multimeters, vacuum glovebox for annealing, and hand tools.
*_*

Data Acquisition, Analysis and Simulation

- Labview for sample fabrication and data acquisition

- Solidworks for designing instrumental parts

- C/C++

- Numerical Recipes

- OOMMF at NIST

- Mathematica

- Origin

*_*

Other Facilities at ASU

In addition to our lab facilities, we often use equipments at ASU nanoFab and LeRoy Eyring Center for Solid State Science at ASU.

LeRoy Eyring Center for Solid State Science

- Various furnaces

- Rutherford backscattering (RBS) for composition and thickness

- X-ray Diffraction (XRD)/X-ray Topography (XRT)

- Imaging Transmission Electron Microscopy (TEM)

- Scanning Probe / Atomic Force Microscopy (SPM/AFM)

- Scanning Electron Microscopy (SEM)

- Focused Ion Beam

ASU nanoFab

- Optical lithography

- Electron beam lithography

- Metal film depostion

- Plasma Etching

*_*