The atto3DR double rotation module provides access to the full magnetic field (e.g. 9 T) in all directions relative to the sample surface. Thus, instead of rotating the magnetic field, the sample can be arbitrarily oriented with respect to a fixed external magnetic field vector. Featuring an eucentric rotation (i.e. the two axes of rotation intersect in the center of sample, which is fixed in space), this makes available a much larger phase space as compared to conventional vector magnets, where the field vector is rotated instead. The reason is that split coil configurations generally do not achieve such high field values, despite being significantly more expensive. The module comes fully wired and equipped with a convenient leadless ceramic chip carrier (LCCC) socket with 20 contacts, making sample exchange a quick and easy task.
All parts are non-magnetic, and it is compatible with all attoCRYO setups with a 2” sample space and exchange gas cooling – whether it is a dry or a liquid setup. The atto3DR allows for rotation around a horizontally fixed axis, and an additional in-plane axis. This enables a ±90° tilt between sample surface and field, as well as another ±90° of in-plane rotation. Thus, any relative orientation between sample and field is accessible.
Fields of Application
PRODUCT KEY FEATURES
- in-situ two-axes rotation
- full field (e.g. 9 T) in 3D
- integrated chip carrier socket
- eucentric rotation
- plug & play module
- resistive encoder for closed loop operation
- software control (GUI & LabVIEW)
- achieve arbitrary field orientations without the need for an expensive vector magnet
- save precious measurement time by programmed routines
- save helium costs by in-situ sample alignment
- perfectly control field/sample orientation of self-assembled nanostructures
- Quantum transport in semiconductor nanodevices
- Quantum Hall effect
- Magnetic anisotropy
- Josephson junctions
- Superconductors with anisotropic gap structure
COMPATIBLE COOLING SYSTEMS
- attoLIQUID2000, attoLIQUID3000/5000 (on request)
Suitable Low Vibration Cryostats
top-loading cryogen free and helium based systems with fast turn-around times
|Cryogen-free, toploading and fully automated cryostat with optional superconducting magnet|
Angle Dependent Magnetoresistance Measurement of GaAs/(Ga, Mn)As Core-Shell Nanowires
Due to the arbitrary orientation inherent to self-assembled materials on the substrate, typical characterization techniques such as magnetoresistance measurements conducted at cryogenic temperatures greatly benefit from the possibility to freely change the mutual orientation of external magnetic field and sample. Although this is easily possible e.g. by using a 3D vector magnet setup, the associated costs (>> 100 k$) are often prohibitive. Single axis sample rotator setups on the other hand not only require choosing either an out-of-plane or in-plane configuration prior to cooldown, but also put firm restrictions on certain measurements which rely on a precise orientation of the field e.g. perpendicular or parallel to an initially unknown direction along a sample structure. The perfect solution to such applications is attocube’s 3-dimensional rotator atto3DR.
|(measured by C. Butschkow in collaboration with attocube application labs 2012; sample courtesy of C. Butschkow, University of Regensburg).
 C. Butschkow et al., Phys. Rev. B 87, 245303 (2013)