EPR and electrical conductivity of the organic superconductor di-tetramethyltetraselenafulvalenium-perchlorate, (TMTSF)2ClO4 and a metastable magnetic state obtained by fast cooling. Tomić, S., Jérome, D., Monod, P., & Bechgaard, K. Journal de Physique Lettres, 43(23):839-844, 1982.
EPR and electrical conductivity of the organic superconductor di-tetramethyltetraselenafulvalenium-perchlorate, (TMTSF)2ClO4 and a metastable magnetic state obtained by fast cooling [link]Website  abstract   bibtex   
After a historical introduction the general principles of the magnetic cooling method are outlined.$\$nFirst, the case of the ideal paramagnetic salt is treated, and this is followed by a discussion of$\$nthe electric and magnetic interaction effects which cause departures from ideal behaviour, and set a$\$nlower limit to the temperatures which can be reached upon adiabatic demagnetization. A description$\$nof experimental techniques and procedures includes the subjects of cryostat and magnet design. The$\$nmethods which have been used to establish the absolute temperature in the range below 1 °K are$\$nsurveyed and a summary of the results obtained is presented. Apart from their usefulness as coolants$\$nand thermometers, paramagnetic salts have intrinsically interesting thermal and magnetic properties,$\$ne.g. specific heat anomalies and hysteresis effects, associated with the internal ordering which$\$nproceeds as the temperature approaches the absolute zero. These properties are discussed in a$\$nseparate section; another deals with the properties of other substances in the region below 1 °K -$\$nmainly metals and liquid helium. A section is also included on the difficult problems associated$\$nwith providing adequate thermal insulation for a low temperature system on the one hand, and thermal$\$ncontact within such a system on the other. The comparatively new developments of cascade$\$ndemagnetizations and continuous cooling cycles are described. Finally, the principles involved in a$\$nrecent striking application of the magnetic cooling method, viz. the spatial orientation of atomic$\$nnuclei, are outlined.
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 title = {EPR and electrical conductivity of the organic superconductor di-tetramethyltetraselenafulvalenium-perchlorate, (TMTSF)2ClO4 and a metastable magnetic state obtained by fast cooling},
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 year = {1982},
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 abstract = {After a historical introduction the general principles of the magnetic cooling method are outlined.$\$nFirst, the case of the ideal paramagnetic salt is treated, and this is followed by a discussion of$\$nthe electric and magnetic interaction effects which cause departures from ideal behaviour, and set a$\$nlower limit to the temperatures which can be reached upon adiabatic demagnetization. A description$\$nof experimental techniques and procedures includes the subjects of cryostat and magnet design. The$\$nmethods which have been used to establish the absolute temperature in the range below 1 °K are$\$nsurveyed and a summary of the results obtained is presented. Apart from their usefulness as coolants$\$nand thermometers, paramagnetic salts have intrinsically interesting thermal and magnetic properties,$\$ne.g. specific heat anomalies and hysteresis effects, associated with the internal ordering which$\$nproceeds as the temperature approaches the absolute zero. These properties are discussed in a$\$nseparate section; another deals with the properties of other substances in the region below 1 °K -$\$nmainly metals and liquid helium. A section is also included on the difficult problems associated$\$nwith providing adequate thermal insulation for a low temperature system on the one hand, and thermal$\$ncontact within such a system on the other. The comparatively new developments of cascade$\$ndemagnetizations and continuous cooling cycles are described. Finally, the principles involved in a$\$nrecent striking application of the magnetic cooling method, viz. the spatial orientation of atomic$\$nnuclei, are outlined.},
 bibtype = {article},
 author = {Tomić, S and Jérome, D and Monod, P and Bechgaard, K},
 journal = {Journal de Physique Lettres},
 number = {23}
}

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