Measurements of magnetic resonance and high-frequency conductivity at low temperatures and high magnetic fields

1999 ◽  
Author(s):  
J. M. Schrama ◽  
Eva J. Rzepniewski ◽  
Arzhang Ardavan ◽  
R. Edwards ◽  
A.-K. Klehe ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Magnetic Fields ◽  
High Frequency ◽  
Low Temperatures ◽  
High Magnetic Fields

ULTRAFAST COHERENT TERAHERTZ SPECTROSCOPY IN HIGH MAGNETIC FIELDS

2002 ◽  
Vol 16 (20n22) ◽  
pp. 3385-3388
Author(s):  
S. A. CROOKER ◽  
A. J. TAYLOR
Keyword(s):  
Magnetic Fields ◽  
Optical Fibers ◽  
High Frequency ◽  
Low Temperatures ◽  
Terahertz Spectroscopy ◽  
High Magnetic Fields ◽  
Superconducting Thin Films ◽  
Optical Gating ◽  
Correlated Electron ◽  
Time Domain Terahertz Spectroscopy

With an aim towards measuring the high-frequency complex conductivity of correlated electron materials in the regime of low temperatures and high magnetic fields, we introduce a method for performing time-domain terahertz spectroscopy directly in the cryogenic bore of existing dc and pulsed-field magnets. Miniature, fiber-coupled THz emitters and receivers are constructed and are demonstrated to work down to 5 K and up to 6 Tesla, for eventual use in higher-field magnets. Maintaining the sub-micron alignment between fiber and antenna during thermal cycling, and obtaining ultrafast (<200fs) optical gating pulses at the end of long optical fibers constitute the major technical challenges of this project. Preliminary data on YBCO superconducting thin films is shown.

Large volume liquid state scalar Overhauser dynamic nuclear polarization at high magnetic field

2019 ◽  
Vol 21 (38) ◽  
pp. 21200-21204 ◽  
Author(s):  
Thierry Dubroca ◽  
Sungsool Wi ◽  
Johan van Tol ◽  
Lucio Frydman ◽  
Stephen Hill
Keyword(s):  
Magnetic Field ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Magnetic Fields ◽  
High Magnetic Field ◽  
Dynamic Nuclear Polarization ◽  
Large Volume ◽  
Liquid State ◽  
Nuclear Polarization ◽  
High Magnetic Fields

Dynamic Nuclear Polarization (DNP) can increase the sensitivity of Nuclear Magnetic Resonance (NMR), but it is challenging in the liquid state at high magnetic fields.

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