Mössbauer-Effect, Magnetic, and Neutron-Diffraction Study of NaFeP₂O₇

Author

R. C. Mercader
L. Terminiello
Gary J. Long, Missouri University of Science and TechnologyFollow
D. G. Reichel
K. Dickhaus
R. Zysler
R. Sanchez
M. Tovar

Abstract

Neutron-diffraction, magnetic-susceptibility, specific-heat, and Mössbauer-effect studies of NaFeP₂O₇ reveal that it is a normal Heisenberg isotropic three-dimensional antiferromagnetic material with a Néel temperature of 29.0 K. NaFeP₂O₇ has the monoclinic P2₁/c magnetic space group, which is the same as the nuclear crystallographic space group. The easy axis of magnetization lies in the monoclinic ac plane at an angle of 21.0° from the c axis. The specific-heat measurements reveal a λ-type anomaly at 28.7(2) K. A molecular-field model analysis indicates that the intrasublattice magnetic exchange coupling J_aa=J_bb=-0.37 cm-1, whereas the intersublattice coupling J_ab=-0.61 cm^-1. No evidence for L-type ferrimagnetism is observed.

Recommended Citation

R. C. Mercader et al., "Mössbauer-Effect, Magnetic, and Neutron-Diffraction Study of NaFeP₂O₇," Physical Review B, vol. 42, no. 1, pp. 25 - 32, American Physical Society (APS), Jul 1990.

The definitive version is available at https://doi.org/10.1103/PhysRevB.42.25

Department(s)

Chemistry

International Standard Serial Number (ISSN)

2469-9950

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 1990 American Physical Society (APS), All rights reserved.

Publication Date

01 Jul 1990