author={Anatole Abragam and Wm. Procter},
  journal={Physical Review},
Some experiments with nuclear calorimetry are described which consisted of studying the variation in polarization produced by a thermic mixture of spin systems of two nuclear species in the same sample. (T.R.H.) 
Spin temperature concept verified by optical magnetometry of nuclear spins
We develop a method of non-perturbative optical control over adiabatic remagnetisation of the nuclear spin system and apply it to verify the spin temperature concept in GaAs microcavities. The
Breakdown of the nuclear-spin-temperature approach in quantum-dot demagnetization experiments
Interacting nuclear spins on a crystalline lattice are commonly believed to be well described within a thermodynamic framework that uses the concept of spin temperature. Demagnetization experiments
Changes of External Conditions
In the previous chapters the authors have dealt with systems in thermodynamic equilibrium, i.e., with systems being and remaining in a state of maximum entropy, with the equations of state expressing the relations among the system variables formulated.
Eigenstate-specific temperatures in two-level paramagnetic spin lattices.
The thermodynamic implications of these entropically induced differences in sign are discussed in light of adiabatic invariance of the entropies, and potential applications of the four ESTs to nanothermometers and to systems with long-range interactions are discussed.
Extending the lifetime of hyperpolarisation
In nuclear magnetic resonance (NMR), one of the most serious inherent challenges is the low sensibility of nuclei. In order to enhance the signal of NMR experiments, the technique of dynamic nuclear
Spin Temperature in Magnetism and in Magnetic Resonance
In Chapter 5 we employed the concept of spin temperature to discuss relaxation. The idea of spin temperature was introduced by Casimir and duPre [6.1] to give a thermodynamic treatment of the
The statistical mechanics of particles obeying discrete spatial quantum theory
The energy levels for a particle confined to a one dimensional potential well are calculated using discrete spatial QM. The partition function is constructed and approximations are made to evaluate