Magnetic susceptibility study of the heavy rare-earth stannate pyrochlores

Bondah-Jagalu, V.; Bramwell, S. T.

doi:10.1139/p01-118

Cited by 31 publications

(35 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[125][126][127] Note the easy axis anisotropy and slightly positive C which match with the canonical spin ices for the heavy rare earths, A ¼ Dy and Ho. However, some unusual very low temperature spin dynamics suggest unique properties for this new spin ice.…”

Section: Pyrochloressupporting

confidence: 53%

Geometrically Frustrated Magnetic Materials

Greedan¹

2010

Functional Oxides

View full text Add to dashboard Cite

Section: Pyrochloressupporting

confidence: 53%

Geometrically Frustrated Magnetic Materials

Greedan¹

2010

Functional Oxides

View full text Add to dashboard Cite

“…In our measurement, the energies of the scattered neutrons are not analysed, and the incident neutron energy (41 K) is much larger than the sample temperature and the energy-scale of magnetic interactions (|θ CW | ≈ 9.6 K [12]). Under these conditions, the measurement integrates over energy transfer ("quasistatic approximation") and is sensitive to the instantaneous spin-pair correlations.…”

Section: Theorymentioning

confidence: 99%

“…It is known that there are three main terms in the spin Hamiltonian. First, an antiferromagnetic nearest-neighbour exchange interaction J 1 ≈ −0.3 K is indicated by the negative value of the Curie-Weiss constant θ CW ≈ −9.6 K [12]. Second, the large value of S implies that the long-range magnetic dipolar interaction is significant, with strength at the nearest-neighbour distance of 0.05 K. Third, a single-ion anisotropy term ∆ ≈ 0.14 K has been indicated by electron-spin resonance measurements [13,14], and is explained by an admixture of excited states with L = 0 into the ground-state multiplet.…”

Section: Introductionmentioning

confidence: 99%

Spin correlations in the dipolar pyrochlore antiferromagnet Gd₂Sn₂O₇

Paddison

Ehlers

Petrenko

et al. 2017

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Abstract. We investigate spin correlations in the dipolar Heisenberg antiferromagnet Gd 2 Sn 2 O 7 using polarised neutron-scattering measurements in the correlated paramagnetic regime. Using Monte Carlo methods, we show that our data are sensitive to weak further-neighbour exchange interactions of magnitude ∼0.5% of the nearestneighbour interaction, and are compatible with either antiferromagnetic next-nearestneighbour interactions, or ferromagnetic third-neighbour interactions that connect spins across hexagonal loops. Calculations of the magnetic scattering intensity reveal rods of diffuse scattering along [111] reciprocal-space directions, which we explain in terms of strong antiferromagnetic correlations parallel to the set of 110 directions that connect a given spin with its nearest neighbours. Finally, we demonstrate that the spin correlations in Gd 2 Sn 2 O 7 are highly anisotropic, and correlations parallel to third-neighbour separations are particularly sensitive to critical fluctuations associated with incipient long-range order.arXiv:1608.05062v1 [cond-mat.str-el]

show abstract

“…Field-cooled (FC) and zero-field-cooled (ZFC) magnetization versus temperature curves were measured on a [43,44]. Small differences in the absolute values obtained for Nd 2 Zr 2 O 7 may be explained by the fact that some measurements were carried out on aligned crystal, along well-defined crystallographic axes, while others were for polycrystalline samples.…”

Section: Magnetization and Heat Capacitymentioning

confidence: 99%

Structural and magnetic investigations of single-crystalline neodymium zirconate pyrochloreNd2Zr2O7

et al. 2015

View full text Add to dashboard Cite

(2015) Structural and magnetic investigations of single-crystalline neodymium zirconate pyrochlore Nd2Zr2O7. Physical Review B (Condensed Matter and Materials Physics), 91 (17). 174416. Permanent WRAP URL:http://wrap.warwick.ac.uk/87756 Copyright and reuse:The Warwick Research Archive Portal (WRAP) makes this work by researchers of the University of Warwick available open access under the following conditions. Copyright © and all moral rights to the version of the paper presented here belong to the individual author(s) and/or other copyright owners. To the extent reasonable and practicable the material made available in WRAP has been checked for eligibility before being made available.Copies of full items can be used for personal research or study, educational, or not-for-profit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. We report structural and magnetic properties studies of large high-quality single crystals of the frustrated magnet Nd 2 Zr 2 O 7 . Powder x-ray diffraction analysis confirms that Nd 2 Zr 2 O 7 adopts the pyrochlore structure. Room-temperature x-ray diffraction and time-of-flight neutron-scattering experiments show that the crystals are stoichiometric in composition with no measurable site disorder. The temperature dependence of the magnetic susceptibility shows no magnetic ordering at temperatures down to 0.5 K. Fits to the magnetic susceptibility data using a Curie-Weiss law reveal a ferromagnetic coupling between the Nd moments. Magnetization versus field measurements show a local Ising anisotropy along the 111 axes of the Nd 3+ ions in the ground state. Specific heat versus temperature measurements in zero applied magnetic field indicate the presence of a thermal anomaly below T ∼ 7 K, but no evidence of magnetic ordering is observed down to 0.5 K. The experimental temperature dependence of the single-crystal bulk dc susceptibility and isothermal magnetization are analyzed using crystal field theory and the crystal field parameters and exchange coupling constants determined. Publisher

show abstract

Magnetic susceptibility study of the heavy rare-earth stannate pyrochlores

Cited by 31 publications

References 26 publications

Geometrically Frustrated Magnetic Materials

Geometrically Frustrated Magnetic Materials

Spin correlations in the dipolar pyrochlore antiferromagnet Gd₂Sn₂O₇

Structural and magnetic investigations of single-crystalline neodymium zirconate pyrochloreNd2Zr2O7

Contact Info

Product

Resources

About

Magnetic susceptibility study of the heavy rare-earth stannate pyrochlores

Cited by 31 publications

References 26 publications

Geometrically Frustrated Magnetic Materials

Geometrically Frustrated Magnetic Materials

Spin correlations in the dipolar pyrochlore antiferromagnet Gd2Sn2O7

Structural and magnetic investigations of single-crystalline neodymium zirconate pyrochloreNd2Zr2O7

Contact Info

Product

Resources

About

Spin correlations in the dipolar pyrochlore antiferromagnet Gd₂Sn₂O₇