Chemically induced magnetic polarisation

Most CIDEP spectrometers have a time resolution of few microseconds or longer. CIDNP is a slower process and only steady-state measurements 

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L.T. Muus, P.W. Atkins, K.A. McLauchlan and J.B, Pedersen (Eds.), Chemically Induced Magnetic Polarisation, Reidel, Dordrecht, 1977. 

Clol Closs, G.L. Chemically Induced Magnetic Polarisation A.R. Leplcy and G.L. Closs, Eds. New York Wiley 1973, 95. 

The addition of a chemical species with a large dielectric constant to induce desired microwave effects in matrices devoid of such substances, or lacking substances with significantly different dielectric constants, can be compared, on a conceptual basis, to cross-polarisation experiments carried out in nuclear magnetic resonance spectroscopy (see Chapter 6). In that case, a nucleus that relaxes relatively rapidly is excited selectively and allowed to transfer that excitation energy to neighbouring nuclei with low or relatively lower relaxation rate (e.g., nuclei being cross-polarised to nuclei). 

Above 130 kbar there is a phase change to a non-magnetic hexagonal phase which has a chemical isomer shift 0-17 mm s more negative than for the body-centred cubic a-iron [13, 15]. The relative line intensities are also affected by pressure due to a pressure-induced polarisation of the iron foil... 

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