Specific heat near TN in (Pr, Nd, Sm, Gd, and Dy) Ba2Cu3O7

Evidence for spin-exchange-driven ordering

A. P. Ramirez, Lynn Schneemeyer, J. V. Waszczak

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Abstract

Magnetic ordering at 2.2 K has been reported for GdBa2Cu3O7. In order to characterize the relevant magnetic interaction we have synthesized and measured the specific heat of polycrystalline RBa2Cu3O7, where R=Pr,Nd,Sm,Gd,andDy. The ordering temperatures are found to vary systematically with the de Gennes factor, suggesting the dominance of spin-spin exchange over dipolar energies for these compounds. The field dependence of the specific-heat peak for DyBa2Cu3O7 implies the order is of antiferromagnetic nature.

Original languageEnglish
Pages (from-to)7145-7147
Number of pages3
JournalPhysical Review B
Volume36
Issue number13
DOIs
StatePublished - 1 Jan 1987

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spin exchange
specific heat
interactions
temperature
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title = "Specific heat near TN in (Pr, Nd, Sm, Gd, and Dy) Ba2Cu3O7: Evidence for spin-exchange-driven ordering",
abstract = "Magnetic ordering at 2.2 K has been reported for GdBa2Cu3O7. In order to characterize the relevant magnetic interaction we have synthesized and measured the specific heat of polycrystalline RBa2Cu3O7, where R=Pr,Nd,Sm,Gd,andDy. The ordering temperatures are found to vary systematically with the de Gennes factor, suggesting the dominance of spin-spin exchange over dipolar energies for these compounds. The field dependence of the specific-heat peak for DyBa2Cu3O7 implies the order is of antiferromagnetic nature.",
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Specific heat near TN in (Pr, Nd, Sm, Gd, and Dy) Ba2Cu3O7 : Evidence for spin-exchange-driven ordering. / Ramirez, A. P.; Schneemeyer, Lynn; Waszczak, J. V.

In: Physical Review B, Vol. 36, No. 13, 01.01.1987, p. 7145-7147.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

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AB - Magnetic ordering at 2.2 K has been reported for GdBa2Cu3O7. In order to characterize the relevant magnetic interaction we have synthesized and measured the specific heat of polycrystalline RBa2Cu3O7, where R=Pr,Nd,Sm,Gd,andDy. The ordering temperatures are found to vary systematically with the de Gennes factor, suggesting the dominance of spin-spin exchange over dipolar energies for these compounds. The field dependence of the specific-heat peak for DyBa2Cu3O7 implies the order is of antiferromagnetic nature.

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