Magnetic and thermal properties of 4f-3d ladder-type molecular compounds
| Autor: | M. L. Kahn, Marco Evangelisti, Y. Leroyer, J. Leandri, Javier Bartolomé, C. Meyers, L.J. de Jongh, Corine Mathonière |
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| Přispěvatelé: | Kamerlingh Onnes Laboratory, Universiteit Leiden [Leiden], Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université de Bordeaux (UB), Instituto de Ciencia de Materiales de Aragón [Saragoza, España] (ICMA-CSIC), University of Zaragoza - Universidad de Zaragoza [Zaragoza], Centre de physique moléculaire optique et hertzienne (CPMOH), Université Sciences et Technologies - Bordeaux 1-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2003 |
| Předmět: |
Heat capacity
Condensed Matter (cond-mat) FOS: Physical sciences Condensed Matter Type (model theory) 010402 general chemistry 01 natural sciences Crystal Magnetic susceptibility Chemical compounds Thermal Antiferromagnetism Isostructural Magnetic materials o-phenylenebisoxamate Physics Quantitative Biology::Neurons and Cognition Condensed matter physics 010405 organic chemistry Magnetic order [CHIM.MATE]Chemical Sciences/Material chemistry 0104 chemical sciences 3. Good health Magnetic anisotropy Crystallography Ferromagnetism [PHYS.COND.CM-GEN]Physics [physics]/Condensed Matter [cond-mat]/Other [cond-mat.other] Condensed Matter::Strongly Correlated Electrons |
| Zdroj: | Physical Review B: Condensed Matter and Materials Physics (1998-2015) Physical Review B: Condensed Matter and Materials Physics (1998-2015), American Physical Society, 2003, 68 (18), 184405 (14 p.). ⟨10.1103/PhysRevB.68.184405⟩ |
| ISSN: | 1098-0121 1550-235X |
| Popis: | We report on the low-temperature magnetic susceptibilities and specific heats of the isostructural spin-ladder molecular complexes L$_{2}$[M(opba)]$_{3\cdot x$DMSO$\cdot y$H$_{2}$O, hereafter abbreviated with L$_{2}$M$_{3}$ (where L = La, Gd, Tb, Dy, Ho and M = Cu, Zn). The results show that the Cu containing complexes (with the exception of La$_{2}$Cu$_{3}$) undergo long range magnetic order at temperatures below 2 K, and that for Gd$_{2}$Cu$_{3}$ this ordering is ferromagnetic, whereas for Tb$_{2}$Cu$_{3}$ and Dy$_{2}$Cu$_{3}$ it is probably antiferromagnetic. The susceptibilities and specific heats of Tb$_{2}$Cu$_{3}$ and Dy$_{2}$Cu$_{3}$ above $T_{C}$ have been explained by means of a model taking into account nearest as well as next-nearest neighbor magnetic interactions. We show that the intraladder L--Cu interaction is the predominant one and that it is ferromagnetic for L = Gd, Tb and Dy. For the cases of Tb, Dy and Ho containing complexes, strong crystal field effects on the magnetic and thermal properties have to be taken into account. The magnetic coupling between the (ferromagnetic) ladders is found to be very weak and is probably of dipolar origin. 13 pages, 15 figures, submitted to Phys. Rev. B |
| Databáze: | OpenAIRE |
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