Specific heat near TN in (Pr, Nd, Sm, Gd, and Dy) Ba2Cu3O7: Evidence for spin-exchange-driven ordering

A. P. Ramirez; L. F. Schneemeyer; J. V. Waszczak

doi:10.1103/PhysRevB.36.7145

Specific heat near TN in (Pr, Nd, Sm, Gd, and Dy) Ba2Cu3O7: Evidence for spin-exchange-driven ordering

A. P. Ramirez, L. F. Schneemeyer, J. V. Waszczak

Chemistry and Biochemistry

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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 language	English
Pages (from-to)	7145-7147
Number of pages	3
Journal	Physical Review B
Volume	36
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevB.36.7145
State	Published - 1987

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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.",

author = "Ramirez, {A. P.} and Schneemeyer, {L. F.} and Waszczak, {J. V.}",

year = "1987",

doi = "10.1103/PhysRevB.36.7145",

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T1 - Specific heat near TN in (Pr, Nd, Sm, Gd, and Dy) Ba2Cu3O7

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AU - Schneemeyer, L. F.

AU - Waszczak, J. V.

PY - 1987

Y1 - 1987

N2 - 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.

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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DO - 10.1103/PhysRevB.36.7145

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JO - Physical Review B

JF - Physical Review B

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ER -

Specific heat near TN in (Pr, Nd, Sm, Gd, and Dy) Ba2Cu3O7: Evidence for spin-exchange-driven ordering

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