Low-frequency detected EPR: Principles and applications

Ацаркин, В. А.; Демидов, В. В.; Ryabushkin, O. A.; Vasneva, G. A.

doi:10.1007/bf03162612

Cited by 1 publication

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“…These data evidenced unambiguously for the TM DNP mechanism. Later on, these results were supported with the use of more sensitive technique based on longitudinal detection of the enhanced magnetic susceptibility [43,44].…”

Section: Ssmentioning

confidence: 89%

Dynamic Nuclear Polarization in Solids: The Birth and Development of the Many-Particle Concept

Ацаркин

Kessenikh

2012

Appl Magn Reson

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A brief review is presented on historical aspects of the dynamic nuclear polarization (DNP) research in 1960-1970s of the last century. Much attention is given to development of the many-particle approach, from pioneering studies of the 3-spin electron-nuclear cross effect to development of spin-temperature concept and thermal mixing mechanism of DNP in solids. Applicability of different models to modern DNP data is briefly discussed.This brief review is focused primarily on historical aspects: we will try to recollect the atmosphere of research in the fields of dynamic nuclear polarization (DNP) and solid-state spin dynamics, typical for the 1960s and 1970s of the last century. The paper does not claim to be exhaustive; in particular, the original references are often replaced by books and reviews. Much attention is given to studies performed in the Soviet Union; some of them are little-known because of the former Iron Curtain and the language barrier (the publications were in Russian). We hope to improve this situation and apologize in advance for a possible bias.At that time, the DNP technique was already well known and successfully applied, mostly in polarized proton targets. The physical interpretation of the DNP in non-conducting solids was restricted to the simplest two-particle picture including an electron spin S i of paramagnetic impurity coupled with a nuclear spin I j of the host lattice by magnetic dipole-dipole interaction. Following the ''solid effect'' (SE) mechanism suggested by Abragam and Proctor [1] (see also the

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Section: Ssmentioning

confidence: 89%