The influence of the environment on the dynamic susceptibility of cerium magnesium nitrate in strong magnetic fields

J.A. Overweg, Jakob Flokstra, G.J. Gerritsma

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Abstract

Dynamic susceptibility curves observed as a function of frequency often deviate considerably from curves predicted by the simple Casimir-Du Pré model. In the case of cerium magnesium nitrate these deviations are mainly caused by the poor thermal conductivity of the liquid or gaseous helium that surrounds the sample and becomes extremely large when the external magnetic field becomes larger than approximately 1 T. We found that, even in this extreme situation, the influence of the environment can be accurately described with the thermal conduction model developed by Flokstra et al. We also discovered that the lattice temperature is stabilized much more effectively if the sample is placed in helium gas at its saturation pressure. The thin helium film that is formed on the surface of the sample provides, through condensation and reevaporation, a far better thermal stabilization of the lattice than bulk liquid helium does. The susceptibility curves that are observed under these conditions differ much less from the Casimir-Du Pré curves.
Original languageUndefined
Pages (from-to)381-388
JournalPhysica B+C
Volume112
Issue number3
DOIs
Publication statusPublished - 1982

Keywords

  • IR-68998

Cite this

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title = "The influence of the environment on the dynamic susceptibility of cerium magnesium nitrate in strong magnetic fields",
abstract = "Dynamic susceptibility curves observed as a function of frequency often deviate considerably from curves predicted by the simple Casimir-Du Pr{\'e} model. In the case of cerium magnesium nitrate these deviations are mainly caused by the poor thermal conductivity of the liquid or gaseous helium that surrounds the sample and becomes extremely large when the external magnetic field becomes larger than approximately 1 T. We found that, even in this extreme situation, the influence of the environment can be accurately described with the thermal conduction model developed by Flokstra et al. We also discovered that the lattice temperature is stabilized much more effectively if the sample is placed in helium gas at its saturation pressure. The thin helium film that is formed on the surface of the sample provides, through condensation and reevaporation, a far better thermal stabilization of the lattice than bulk liquid helium does. The susceptibility curves that are observed under these conditions differ much less from the Casimir-Du Pr{\'e} curves.",
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author = "J.A. Overweg and Jakob Flokstra and G.J. Gerritsma",
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The influence of the environment on the dynamic susceptibility of cerium magnesium nitrate in strong magnetic fields. / Overweg, J.A.; Flokstra, Jakob; Gerritsma, G.J.

In: Physica B+C, Vol. 112, No. 3, 1982, p. 381-388.

Research output: Contribution to journalArticleAcademic

TY - JOUR

T1 - The influence of the environment on the dynamic susceptibility of cerium magnesium nitrate in strong magnetic fields

AU - Overweg, J.A.

AU - Flokstra, Jakob

AU - Gerritsma, G.J.

PY - 1982

Y1 - 1982

N2 - Dynamic susceptibility curves observed as a function of frequency often deviate considerably from curves predicted by the simple Casimir-Du Pré model. In the case of cerium magnesium nitrate these deviations are mainly caused by the poor thermal conductivity of the liquid or gaseous helium that surrounds the sample and becomes extremely large when the external magnetic field becomes larger than approximately 1 T. We found that, even in this extreme situation, the influence of the environment can be accurately described with the thermal conduction model developed by Flokstra et al. We also discovered that the lattice temperature is stabilized much more effectively if the sample is placed in helium gas at its saturation pressure. The thin helium film that is formed on the surface of the sample provides, through condensation and reevaporation, a far better thermal stabilization of the lattice than bulk liquid helium does. The susceptibility curves that are observed under these conditions differ much less from the Casimir-Du Pré curves.

AB - Dynamic susceptibility curves observed as a function of frequency often deviate considerably from curves predicted by the simple Casimir-Du Pré model. In the case of cerium magnesium nitrate these deviations are mainly caused by the poor thermal conductivity of the liquid or gaseous helium that surrounds the sample and becomes extremely large when the external magnetic field becomes larger than approximately 1 T. We found that, even in this extreme situation, the influence of the environment can be accurately described with the thermal conduction model developed by Flokstra et al. We also discovered that the lattice temperature is stabilized much more effectively if the sample is placed in helium gas at its saturation pressure. The thin helium film that is formed on the surface of the sample provides, through condensation and reevaporation, a far better thermal stabilization of the lattice than bulk liquid helium does. The susceptibility curves that are observed under these conditions differ much less from the Casimir-Du Pré curves.

KW - IR-68998

U2 - 10.1016/0378-4363(82)90097-3

DO - 10.1016/0378-4363(82)90097-3

M3 - Article

VL - 112

SP - 381

EP - 388

JO - Physica B+C

JF - Physica B+C

SN - 0378-4363

IS - 3

ER -