Nuclear Magnetic Resonance.
| FEATURES | |
|---|---|
| Local Contact | |
| DRESDEN | Hannes Kühne |
| GRENOBLE | Mladen Horvatić |
| TOULOUSE | Nicolas Bruyant |
| Field range | |
| DRESDEN | 0 ... 70 T |
| GRENOBLE | variable up to 36 T (maximum available DC field in 2018) |
| TOULOUSE | 0 ... 58 T |
| Temperature range | |
| DRESDEN | 2.0 – 300 K |
| GRENOBLE | Variable temperature for solid state physics NMR: 1.3 K to 300 K with ⁴He variable temperature insert, 350 mK to 4.2 K with ³He variable temperature insert, 40 mK to 1.0 K with ³He/⁴He dilution refrigerator. Room temperature (regulated) for high resolution NMR for chemistry. |
| TOULOUSE | 1.5 ... 300 K |
| Sample size | |
| DRESDEN | <10 mm³ to avoid spectral broadening |
| GRENOBLE | Solid state physics NMR: < 10 mm³, almost any sample can be accommodated. High resolution NMR for chemistry: < 1 cm³, almost any sample can be accommodated. |
| TOULOUSE | Powders, liquids or single crystals < 5 mm diameter, <10 mm length minimum sample sized limited by sensitivity The samples can be mounted with a defined orientation |
| Resolution | |
| DRESDEN | 10¹⁷ ¹H spins typically |
| GRENOBLE | Solid state physics NMR: 50 ppm / 1 mm³ at variable magnetic field (< 10 ppm for single-scan recordings). High resolution NMR for chemistry (ferroshim and spin-lock): 20 ppm / 1 cm³ at fixed magnetic field (< 10 ppm for single-scan recordings) |
| TOULOUSE | |
| Limitations | |
| DRESDEN | |
| GRENOBLE | |
| TOULOUSE | Nucleus with short T1 |
| Typical experiment | |
| DRESDEN | NMR from 10 – 3000 MHz with at least 200 W pulse power NMR data is recorded in the maximum regime of the field pulse during a time window of several ms, typically. Several FID or echo signals can be recorded during one field pulse. |
| GRENOBLE | Variable frequency NMR for any NMR active nucleus up to 1.5 GHz: Magnetic field and/or temperature dependence of NMR spectra as well as longitudinal (T₁) and transverse (T₂) NMR relaxation. High resolution NMR spectra at fixed field (ferroshim and spin-lock). CPMG multi-pulse experiments. |
| TOULOUSE | NMR from 200MHz to 1200MHz with 500 W pulse power Single scan NMR looking for phase transition in the spectrum Knight shift, chemical shift determination |
| Sample Holder | |
| DRESDEN | The NMR coil is mounted on a platform with 10 mm diameter. |
| GRENOBLE | Tailored NMR coils for optimized sensitivity. Top-tuning and bottom-tuning configuration. Goniometer option. High pressure cell option (< 2.4 GPa). Further details and drawings available upon request. |
| TOULOUSE | NMR coil is directly winded around the sample for maximum sensitivity |
| Sample environment | |
| DRESDEN | Gaseous helium from 300 down to 4 K, liquid helium below. |
| GRENOBLE | < 4.2 K: sample in liquid (⁴He, ³He or ³He/⁴He mixture). > 4.2 K: sample in gas. |
| TOULOUSE | Gaseous helium from 300K down to 4K, liquid helium below 4K |
| Examples | |
| DRESDEN | Spin-dimer systems: J. Kohlrautz et al., J. Magn. Reson. 271, 52 (2016) NMR shift and T1: J. Kohlrautz et al., J. Magn. Reson. 263, 1 (2016) NMR setup: B. Meier et al., Rev. Sci. Instrum. 83, 083113 (2012) Signal averaging: B. Meier et al., J. Magn. Reson. 210, 1 (2011) |
| GRENOBLE | Overview C. R. Physique 18, 331–348 (2017) Quantum magnets Phys. Rev. Lett. 114, 227202/1-5 (2015) High-Tc superconductors PNAS 114, 13148 (2017) Organic conductors Nature Phys. 10, 928–932 (2014) Heavy Fermions Phys. Rev. B 93, 201112(R) (2016) Magnetic field dependence of paramagnetic relaxation enhancement (PRE): 1H PRE up to 1.4 GHz ChemPhysChem 15, 3608 (2014). Resolution enhanced NMR of quadrupolar nuclei: 91Zr NMR at 30 T Inorganic Chemistry 48, 8709 (2009). |
| TOULOUSE | Experimental setup description Abou-Hamad, E et al.State Nucl. Magn. Reson., 2011, 40, 42 - 44 High homogeneity magnet: High homogeneity magnet Frustrated magnet High-Tc superconductors |
| DRESDEN | |
| GRENOBLE | |
| TOULOUSE | |
| FEATURES | DRESDEN | GRENOBLE | TOULOUSE |
|---|---|---|---|
| Local Contact | Hannes Kühne |
Mladen Horvatić |
Nicolas Bruyant |
| Field range | 0 ... 70 T | variable up to 36 T (maximum available DC field in 2018) | 0 ... 58 T |
| Temperature range | 2.0 – 300 K | Variable temperature for solid state physics NMR: 1.3 K to 300 K with ⁴He variable temperature insert, 350 mK to 4.2 K with ³He variable temperature insert, 40 mK to 1.0 K with ³He/⁴He dilution refrigerator. Room temperature (regulated) for high resolution NMR for chemistry. |
1.5 ... 300 K |
| Sample size | <10 mm³ to avoid spectral broadening | Solid state physics NMR: < 10 mm³, almost any sample can be accommodated. High resolution NMR for chemistry: < 1 cm³, almost any sample can be accommodated. |
Powders, liquids or single crystals < 5 mm diameter, <10 mm length minimum sample sized limited by sensitivity The samples can be mounted with a defined orientation |
| Resolution | 10¹⁷ ¹H spins typically | Solid state physics NMR: 50 ppm / 1 mm³ at variable magnetic field (< 10 ppm for single-scan recordings). High resolution NMR for chemistry (ferroshim and spin-lock): 20 ppm / 1 cm³ at fixed magnetic field (< 10 ppm for single-scan recordings) |
|
| Limitations | Nucleus with short T1 | ||
| Typical experiment | NMR from 10 – 3000 MHz with at least 200 W pulse power NMR data is recorded in the maximum regime of the field pulse during a time window of several ms, typically. Several FID or echo signals can be recorded during one field pulse. |
Variable frequency NMR for any NMR active nucleus up to 1.5 GHz: Magnetic field and/or temperature dependence of NMR spectra as well as longitudinal (T₁) and transverse (T₂) NMR relaxation. High resolution NMR spectra at fixed field (ferroshim and spin-lock). CPMG multi-pulse experiments. |
NMR from 200MHz to 1200MHz with 500 W pulse power Single scan NMR looking for phase transition in the spectrum Knight shift, chemical shift determination |
| Sample Holder | The NMR coil is mounted on a platform with 10 mm diameter. | Tailored NMR coils for optimized sensitivity. Top-tuning and bottom-tuning configuration. Goniometer option. High pressure cell option (< 2.4 GPa). Further details and drawings available upon request. |
NMR coil is directly winded around the sample for maximum sensitivity |
| Sample environment | Gaseous helium from 300 down to 4 K, liquid helium below. | < 4.2 K: sample in liquid (⁴He, ³He or ³He/⁴He mixture). > 4.2 K: sample in gas. |
Gaseous helium from 300K down to 4K, liquid helium below 4K |
| Examples | Spin-dimer systems: J. Kohlrautz et al., J. Magn. Reson. 271, 52 (2016) NMR shift and T1: J. Kohlrautz et al., J. Magn. Reson. 263, 1 (2016) NMR setup: B. Meier et al., Rev. Sci. Instrum. 83, 083113 (2012) Signal averaging: B. Meier et al., J. Magn. Reson. 210, 1 (2011) |
Overview C. R. Physique 18, 331–348 (2017) Quantum magnets Phys. Rev. Lett. 114, 227202/1-5 (2015) High-Tc superconductors PNAS 114, 13148 (2017) Organic conductors Nature Phys. 10, 928–932 (2014) Heavy Fermions Phys. Rev. B 93, 201112(R) (2016) Magnetic field dependence of paramagnetic relaxation enhancement (PRE): 1H PRE up to 1.4 GHz ChemPhysChem 15, 3608 (2014). Resolution enhanced NMR of quadrupolar nuclei: 91Zr NMR at 30 T Inorganic Chemistry 48, 8709 (2009). |
Experimental setup description Abou-Hamad, E et al.State Nucl. Magn. Reson., 2011, 40, 42 - 44 High homogeneity magnet: High homogeneity magnet Frustrated magnet High-Tc superconductors |