Probing the magnetic ground state of the molecular dysprosium triangle with muon spin relaxation

Salman, Z.; Giblin, Sean; Lan, Yanhua; Powell, Annie K.; Scheuermann, R.; Tingle, R.; Sessoli, Roberta

doi:10.1103/physrevb.82.174427

Cited by 26 publications

(22 citation statements)

References 25 publications

(37 reference statements)

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“…of the quasi-static nature of the local fields experienced by the implanted muons, i.e., the local field is predominantly static with a smaller dynamic component. In this case the relaxation can be described using a phenomenological function; a Lorentzian Kubo-Toyabe (LKT) multiplied by an exponential 21 . The LKT accounts for the relaxation due to the distribution of static fields while the exponential accounts for the depolarization due to the small dynamic component.…”

Section: µSr Measurementsmentioning

confidence: 99%

The Nature of Magnetic Ordering in Magnetically Doped Topological Insulator Bi$_{2-x}$Fe$_x$Se$_3$

Salman¹,

Pomjakushina²,

Pomjakushin³

et al. 2012

Preprint

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We present a detailed investigation of the magnetic and structural properties of magnetically doped 3D topological insulator Bi2Se3. From muon spin relaxation measurements in zero magnetic field, we find that even 5% Fe doping on the Bi site turns the full volume of the sample magnetic at temperatures as high as ∼ 250K. This is also confirmed by magnetization measurements. Two magnetic "phases" are identified; the first is observed between ∼ 10−250K while the second appears below ∼ 10K. These cannot be attributed to impurity phases in the samples. We discuss the nature and details of the observed magnetism and its dependence on doping level.

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Section: µSr Measurementsmentioning

confidence: 99%

The Nature of Magnetic Ordering in Magnetically Doped Topological Insulator Bi$_{2-x}$Fe$_x$Se$_3$

Salman¹,

Pomjakushina²,

Pomjakushin³

et al. 2012

Preprint

Self Cite

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“…This was the first detection of a toroidal moment in a molecular system, which caused its intensive study, first of all, in the original Dy 3 triangle. [29][30][31][32] In particular, investigations of the magnetoelectric properties of this compound revealed specific magnetoelectric and magneto-current effects related to its toroidal moment. 33,34 It was shown that this molecule is rather rich and versatile for manipulation by external electric and magnetic fields or just by current.…”

Section: Introductionmentioning

confidence: 99%

Single-molecule toroics in Ising-type lanthanide molecular clusters

et al. 2014

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Single-molecule toroics (SMTs) are defined, by analogy with single-molecule magnets, as bistable molecules with a toroidal magnetic state, and seem to be most promising for future applications in quantum computing and information storage and use as multiferroic materials with magnetoelectric effect. As an interdisciplinary research area that spans chemistry, physics and material sciences, synthetic chemists have produced systems suitable for detailed study by physicists and materials scientists, while ab initio calculations have been playing a major role in the detection of toroidal magnetization and the advancement of this field. In this tutorial review, we demonstrate the research developed in the fascinating and challenging field of molecular-based SMTs with particular focus on how recent studies tend to address the issue of toroidal arrangement of the magnetic moment in these systems. Herein, nine typical SMTs are summarized, showing that the assembly of wheel-shaped complexes with the high symmetry of the molecule unit and strong intra-molecular dipolar interactions using strong anisotropy metal ions represents the most promising route toward the design of a toroidal moment. Furthermore, the linkage of such robust toroidal moment units with ferromagnetic type through appropriate bridging ligands enhances the toroidal magnetic moment per unit cell.

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“…The dysprosium-based compound exhibits a slow relaxation of magnetization with a blocking temperature of 3 K at 1500 Hz with an energy barrier of 33 K, which is a typical feature of single molecule magnets (SMMs). 27,30,31 With regard to a similar structural motif, an iso-propoxide-bridged dysprosium square-based pyramid [Dy 5 O(OiPr) 13 ] exhibiting a slow magnetic relaxation at temperatures as high as 40 K was prepared recently. 32 The thermal energy barrier to relaxation of magnetization of this single-molecule magnet is 530 K.…”

Section: Introductionmentioning

confidence: 99%

Slow magnetic relaxation in four square-based pyramidal dysprosium hydroxo clusters ligated by chiral amino acid anions – a comparative study

et al. 2013

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The synthesis and characterization of three chiral and one achiral amino acid anion ligated dysprosium hydroxo clusters [Dy5(OH)5(α-AA)4(Ph2acac)6] (α-AA = d-PhGly, l-Pro, l-Trp, Ph2Gly; Ph2acac = dibenzoylmethanide) are reported. The solid state structures were determined using single crystal X-ray diffraction and show that five Dy(iii) ions are arranged in a square-based pyramidal geometry with NO7-donor-sets for the basal and O8-donor-sets for the apical Dy atom. Both static (dc) and dynamic (ac) magnetic properties were investigated for all four compounds and show a slow relaxation of magnetization, indicative of single molecule magnet (SMM) behaviour below 10 K in all cases. The similar SMM behaviour observed for all four compounds suggests that the very similar coordination geometries seen for the dysprosium atoms in all members of this family, which are independent of the amino acid ligand used, play a decisive role in steering the contribution of the single ion anisotropies to the observed magnetic relaxation.

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Probing the magnetic ground state of the molecular dysprosium triangle with muon spin relaxation

Cited by 26 publications

References 25 publications

The Nature of Magnetic Ordering in Magnetically Doped Topological Insulator Bi$_{2-x}$Fe$_x$Se$_3$

The Nature of Magnetic Ordering in Magnetically Doped Topological Insulator Bi$_{2-x}$Fe$_x$Se$_3$

Single-molecule toroics in Ising-type lanthanide molecular clusters

Slow magnetic relaxation in four square-based pyramidal dysprosium hydroxo clusters ligated by chiral amino acid anions – a comparative study

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