Electron Spin Resonance (ESR) Spectroscopy Extends to 1 THz Range

We are delighted to have successfully completed the installation of an Edinburgh Instruments FIRL100 CO2/ FIR (THz) Laser system at Dresden High Magnetic Field Laboratory (HLD) Helmholtz-Zentrum Dresden-Rossendorf (HZDR).

The FIRL-100 laser will be used for the multi-frequency pulsed-field (up to 70 T) ESR spectroscopy of strongly-correlated magnets, including low-dimensional and frustrated spin systems, high-Tc superconductors and related compounds, multiferroics, etc.

Electron spin resonance (ESR) spectroscopy is based on the detection of resonance absorption of electromagnetic radiation corresponding to transitions between electron spin energy levels split by internal effects  (e.g., crystal-field anisotropy, exchange interactions, etc.)  [1] and/or by an applied magnetic field. The strength of such interactions in magnetic materials can vary from tens of millikelvin to hundreds of kelvin  (which corresponds to a frequency range from tens of megahertz to tens of terahertz). That is why extending the frequency range of ESR techniques towards 1 THz (and beyond) appears to be one of the central issues in modern ESR spectroscopy.

The FIRL-100 features both CO2 pump laser and far-infrared (FIR) cavity in an invar stabilised integrated head.  CO2 laser lines in the spectral region 9.1-10.9 micron are accessible via a movable mirror. The FIR laser output power is >150 mW at 118.8 µm with CH3OH gas. A handheld control unit is used for CO2 length control and for length control of the FIR cavity.

We are excited that with help of the FIRL-100 our customer at the Dresden High Magnetic Field Laboratory will be able to extend the frequency range of ESR techniques towards 1 THz.

As one of the world’s leading manufacturers of state-of-the-art gas lasers, we pride ourselves in being able to meet the most demanding research and technical requirements.

Formed in 1971, Edinburgh Instruments were formed as the first spin-out from Heriot-Watt University and the first private company on Britain's first University "Research Park”.

Edinburgh Instruments (EI) is located in purpose built facilities just outside Edinburgh, where it employs over 75 people. The company is involved in the development, manufacture and sale of a wide range of high technology products. Product ranges include lasers, analytical spectrometers and accessories supplied by the Photonics Division and gas detection and monitoring products supplied by the Sensors Division.

EI has an extensive global distribution network and has a highly prized reputation for the delivery of high quality, accurate instrumentation together with one to one customer service support.

In February 2013 Edinburgh Instruments Ltd was acquired by Techcomp (Europe) Ltd.

Press Enquiries: Olena Hutchison, Edinburgh Instruments, 2 Bain Square, Kirkton Campus, Livingston. EH54 7DQ. UK. Tel: +44 1506 425 300 Fax: +44 1506 425 320   E-mail: [email protected]  Internet: www.edinst.com

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