The speed of the pulse actually increases signal to noise compared to measurements in superconducting magnets. Magnetic fields up 100 T are available. Samples are measured in a helium environment down to 0.5 K. Dielectric constant can also be measured in dc magnetic fields to 20 T and in pulsed fields up to 60 T in the mid or long-pulse magnets using a capacitance at frequencies up to 50 kHz.
Multiferroics combine electric and magnetic ordering in the same material. When these two properties are coupled, then a magnetic field can control the electric polarization, and an electric field can control the magnetization. This can lead to new applications such as ultra-sensitive solid state magnetic sensors, computer memory that combines the best properties of ferroelectric storage and magnetic read/write, solid-state microwave and high-power devices, energy harvesting, and other novel and smart circuit devices.
- 14 Tesla PPMS, 20 Tesla Oxford system
- Current-to-voltage amplifiers
- Keithley Electrometers
- GC Capacitance bridge up to 50 kHz
- AH 2500 Capacitance bridge 1 Khz
- High-voltage power supplies
Images & Sample Data
Click on an image for larger view and details.
- Sample data showing pC/cm² resolution. Sample data showing pC/cm² resolution.
- Multifunctional materials. Multifunctional materials.
- Data from arXiv:1105.2058. on Lu₂MnCoO₆. Data from arXiv:1105.2058. on Lu₂MnCoO₆.
- Rough schematic of electric polarization setup. Rough schematic of electric polarization setup.
- High magnetic field transitions. High magnetic field transitions.
- Custom electric polarization probe. Custom electric polarization probe.
Jae Wook Kim, et al, Multiferroicity with coexisting isotropic and anisotropic spins in Ca3Co2-xMnxO6, Phys. Rev. B Rapid-Comm.89 (2014) Read online
E.D. Mun, et al, Magnetic field induced transition in vanadium spinels, Phys. Rev. Letters 112 (2014) Read online
V.S. Zapf, et al, Magnetically-induced electric polarization in an organo-metallic magnet, Phys. Rev. B 82 (2010) Read online