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Physics, chemistry and materials science in very high magnetic fields: Nuclear Magnetic Resonance and beyond
Published on 2013-01-034120 Views
High magnetic fields are one of the most powerful tools to study, modify and control the different states of matter. Whereas commercial state-of-the-art superconducting magnets reach magnetic fields u
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Presentation
Physics, chemistry and materials science in very high magnetic fields: Nuclear Magnetic Resonance and beyond00:00
Matter and magnetic field (1)01:00
Generation of Magnetic Fields03:07
Generation of Magnetic Field03:45
Generation of magnetic fields (2)05:19
High Magnetic Field Facilities -Worldwide07:01
EMFL – European Magnetic Field Laboratory07:50
Laboratoire National des Champs Magnétiques Intenses08:39
The Grenoble High Magnetic Field Laboratory (LNCMI)09:09
LNCMI Grenoble: Mission and In-house science09:56
Science in high magnetic fields – Instrumentation11:13
Sample environment for user at LNCMI-Grenoble13:47
NEW 2012: Thermoelectricity at LNCMI Grenoble: 35T, 300 mK15:01
High field magnets and levitation: zero gravity conditions (1)16:11
High field magnets and levitation: zero gravity conditions (2)16:40
High field magnets and levitation: application17:50
Matter and magnetic field (2)18:45
NMR Magnets and NMR families18:56
NMR science and instrumentation at ultrahigh magnetic fields19:43
LNCMI 3He NMR probe20:26
LNCMI Grenoble NMR group - people involved in high fields20:49
Spatially resolved magnetization in Bose-Einstein Condensed BaCuSi2O622:00
Quantum magnetism of coupled antiferromagnetic S=1/2 dimers22:36
NMR in high magnetic fields: quantum phase transitions24:06
BaCuSi2O6 – a candidate for Bose-Einstein Condensation (BEC)24:36
Correspondance of Bose gas and BEC in antiferromagnets25:23
BaCuSi2O6: BEC with dimensional reduction by geometrical frustration26:33
Structural phase transition below 90 K: inequivalent dimer layers27:26
Theory of bosonic bilayers with frustratated proximity effect28:24
NMR – microscopic probe of magnetism29:40
NMR signature of Bose-Einstein Condensation (BEC) of spin dimers30:12
NMR in resistive magnets down to 50 mK using 3He/4He dilution refrigerator31:03
29Si NMR high field spectra31:26
63Cu NMR above Hc measures local boson density in each plane32:36
Quantitative model by analysis of 29Si and 63Cu NMR + Theory34:02
Summary – BEC in BaCuSi2O6 as seen by NMR35:09
Matter and magnetic field (3)35:17
Magnetic Resonance Spectroscopy in Chemistry and Materials Science35:36
NMR – interactions, sensitivity and resolution36:14
Nuclear spin precession in a magnetic field: pulsed field NMR36:39
Sensitivity and resolution in NMR36:59
NMR high field gain of sensitivity37:22
Sensitivity enhanced NMR probeheads with strong H1 fields37:50
NMR in powder samples – resolution problem38:32
NMR methods to overcome orientation dependence38:53
Special case of interest: interaction of quadrupolar nuclei (I>1/2)39:27
High field NMR of half integer quadrupolar nuclei39:54
More than 75% of all NMR active nuclei are quadrupolar nuclei …40:04
Solid state NMR high field gain in chemistry and material science40:30
High resolution NMR: Stable and homogeneous fields at LNCMI (1)41:12
High resolution NMR: Stable and homogeneous fields at LNCMI (2)42:13
NMR high field gain in 91Zr, a low-g, low abundant quadrupolar nuclei44:16
91Zr NMR as a structural probe44:49
First solid state chemistry user experiment, 91Zr NMR at 30 T45:36
Systematic recording of Zr compounds at 30 T with new NMR probe46:24
NMR in resistive magnets at ultrahigh magnetic fields47:01
Matter and magnetic field (4)47:35
LNCMI Grenoble47:51