Realization of the one-dimensional anisotropic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>X</mml:mi><mml:mi>Y</mml:mi></mml:mrow></mml:math>model in a Tb(III)-W(V) chain compound

Pasca, E.; Roscilde, Tommaso; Evangelisti, Marco; Burzurí, Enrique; Luìs, Fernando; Jongh, L.J. de; Tanase, Stéfania

doi:10.1103/physrevb.85.184434

Cited by 7 publications

(4 citation statements)

References 22 publications

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“…In this respect, it deserves to be noted that weak ferro- or antiferromagnetic interactions were reported in previous magneto-structural studies concerning cyanido–bridged compounds with these metal ions. So, for previously reported examples of chains, layers, ,, and 3D networks enclosing cyanido-bridged {Tb III W V } pairs, the magnetic coupling is found weakly ferromagnetic. Also, very weak ferromagnetic interactions between Dy III and W V through a single-cyanide bridge were observed in the hetero-dinuclear complex [Dy III (terpy)(DMF) 4 ][W V (CN) 8 ]·6H 2 O·8EtOH (terpy = 2,2′:6′,2″-terpyridine; DMF = dimethylformamide; J DyW = +0.23 cm –1 ) and in the chain compound [Dy III (pzam) 3 (H 2 O)W V (CN) 8 ]·H 2 O (pzam = pyrazine-2-carboxamide), which account for the increase of χ M T at very low temperatures in their respective χ M T against T plots.…”

Section: Resultsmentioning

confidence: 64%

“…Eight-coordinate [M m (CN) 8 ] (8– m )– complexes represent a versatile class of cyanide-based metalloligands that proved to be a suitable platform to assemble functional molecular materials (M = Mo and W and m = 4 or 5). − In past decade, the complexes including cyanido-bridged {Ln III M IV/V } pairs of ions have received an increasing attention, the large coordination number of the trivalent rare-earth cations, the high denticity of the M IV/V from the cyanide-bearing metalloligand, and the flexible molecular geometry of the octacyanometallate units affording a variety of extended structures with different topologies (M = Mo and W). − The systems comprising rare-earth ions and paramagnetic [M V (CN) 8 ] 3– moieties are particularly interesting. The overlap between the diffuse magnetic 4(5)d orbitals of M V cations and the inner 4f orbitals of the lanthanide(III) ions leads to ferromagnets, , short- to long-range ferromagnetic transitions, and coexistent magneto-optical properties. − The single-ion anisotropy and large spin value of the ground state of the Ln III ions is very appealing for the design of d–f nanomagnets .…”

Section: Introductionmentioning

confidence: 99%

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Cyanido-Bridged {Ln^IIIW^V} Heterobinuclear Complexes: Synthesis and Magneto-Structural Study

et al. 2017

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A new series of cyanido-bridged {LnW} heterobinuclear complexes of formula [Ln(pyim)(i-PrOH)(HO)(μ-CN)W(CN)]·2HO [Ln = Gd (1), Tb (2), Dy (3), Ho (4), and Er (5); pyim = 2-(1H-imidazol-2-yl)-pyridine) and i-PrOH = isopropyl alcohol] were synthesized by one-pot reaction between (NHBu)[W(CN)] and [Ln(pyim)] complexes (generated in situ by mixing the corresponding Ln ions and the pyim ligand). Compounds 1-5 are isomorphous and crystallize in the monoclinic system P2/n space group. Their crystal structure consists of binuclear units in which the octacyanotungstate(V) anion coordinates to the corresponding Ln ion through a single cyanide ligand. The tungsten(V) and lanthanide(III) ions are eight-coordinated, in distorted square antiprism (W) and distorted trigonal dodecahedron (Ln) geometries, respectively. The direct-current (dc) magnetic properties for 1-5 reveal the occurrence of weak antiferromagnetic interactions between W and Ln cation, with S, F, H, I, and I as ground terms for Gd, Tb, Dy Ho, and Er, respectively [J = -1.19(1) (1), -1.02(2) (2), -1.10(2) (3), -1.30(2) (4), and -1.50(3) cm (5), the spin Hamiltonian being defined as H = -J S·S]. The fit of the χT data of 2-4 points out a positive value for the energy gap between the M components (Δ). This feature is corroborated by their Q-band electron paramagnetic resonance spectra at low temperature, which clearly show M = 0 (2 and 4) and ±1/2 (3 and 5). Incipient frequency-dependent alternating-current magnetic susceptibility signals are observed for 3 and 5 under applied dc fields supporting the presence of slow magnetic relaxation behavior, the blocking temperatures being below 2.0 K. This new series of {LnW} heterobinuclear compounds provides more insights into the exchange magnetic interaction between 5d and 4f centers via the cyanide-bridge, for which scarce information is available to date.

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Section: Resultsmentioning

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Cyanido-Bridged {Ln^IIIW^V} Heterobinuclear Complexes: Synthesis and Magneto-Structural Study

et al. 2017

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“…In 2005, Bernot et al reported a series of rare earth element based single chain magnet using radical as a bridging ligand, where Tb(III) based SCM has also been reported [18]. In 2012, Pasca et al reported a cyanido bridged one dimensional chain of tungsten and terbium [42]. In 2012, Liu et al and in 2014, Hu et al reported Tb(III) based 1D chain where the bridging ligand was the basic unit of nitronyl nitroxide based radical [43,44].…”

Section: Introductionmentioning

confidence: 99%

Field Induced Slow Magnetic Relaxation in a Non Kramers Tb(III) Based Single Chain Magnet

Kharwar¹,

Mondal²,

Konar³

2018

Magnetochemistry

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Herein, we report a novel Tb(III) single chain magnet with the chemical formulae [Tb(μ-OH2)(phen)(μ-OH)(nb)2]n by using 4-nitrobenzoic acid (Hnb) and 1,10-phenanthroline (phen) as ligand system. The single-crystal X-ray diffraction reveals that 4-nitrobenzoic acid acts as a monodentate ligand, water and hydroxyl ions are the bridging ligand and the phen serves as a bidentate chelating ligand. The static magnetic susceptibility measurement (from 2 K to 300 K) shows ferromagnetic interaction at very low temperature (below 6 K). The alternating current (AC) susceptibility data of the complex show temperature and frequency dependence under an applied 2000 Oe DC (direct current) field. The phen moiety behaves as an antenna and enables the complex to show the green light fluorescence emission by absorption-energy transfer-emission mechanism. To calculate the exchange interaction, broken symmetry density functional theory (BS-DFT) calculations have been performed on a model compound which also reveals weak ferromagnetic interaction. Ab initio calculations reveals the anisotropic nature (gz = 15.8, gy, gy = 0) of the metal centre and the quasi doublet nature of ground state with small energy gap and that is well separated from the next excited energy state.

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“…Importantly, quantum spin chains in many cases are amenable to rigorous analysis that permits to obtain results free of using any uncontrolled approximations [4][5][6][7][8] . At the same time, real solid-state representatives of exactly solved quantum spin-chain models have become available due to a recent progress in material sciences and comparison of theoretical predictions with experimental observations has thus become possible 3,9 .…”

Section: Introductory Remarksmentioning

confidence: 99%

Compressibility of deformable spin chains near quantum critical points

2013

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We calculate the ground-state compressibility of a deformable spin-1/2 Heisenberg-Ising chain with Dzyaloshinskii-Moriya interaction to discuss how a quantum critical point inherent in this spin system may manifest itself in the elastic properties of the underlying lattice. We compare these results with the corresponding ones for the spin-1/2 Ising chain in a longitudinal or transverse field and the spin-1/2 XX chain in a transverse field. The inverse compressibility of the spin-1/2 XX chain in a transverse field exhibits a hysteresis in a vicinity of quantum critical point that is accompanied with the finite jump of compressibility. Contrary to this, the inverse compressibility diminishes continuously close to a quantum critical point of the spin-1/2 Ising chain in a transverse field and the spin-1/2 Heisenberg-Ising bond alternating chain. I. INTRODUCTORY REMARKSQuantum spin chains provide an excellent play-ground for theoretical studies of collective quantum phenomena. They may exhibit very rich low-temperature behavior showing numerous quantum phases (sometimes exotic ones which are characterized by non-conventional order parameters) and quantum critical points 1 . Moreover, including spin-lattice interactions may lead to new phenomena like, e.g., spin-Peierls instabilities 2,3 . Importantly, quantum spin chains in many cases are amenable to rigorous analysis that permits to obtain results free of using any uncontrolled approximations 4-8 . At the same time, real solid-state representatives of exactly solved quantum spin-chain models have become available due to a recent progress in material sciences and comparison of theoretical predictions with experimental observations has thus become possible 3,9 .In the present paper we wish to discuss how quantum critical point, inherent in a system of interacting quantum spins, may manifest itself in the properties of the underlying lattice. For this purpose we consider simple but nontrivial exactly solvable spin models focusing in particular on a spin-1/2 Heisenberg-Ising chain with Dzyaloshinskii-Moriya interaction. We also consider a harmonic one-dimensional lattice and use an adiabatic treatment assuming that the lattice may rearrange itself to suit a "request" of the interacting quantum spins. The results to be obtained will be confronted with the corresponding ones for three exactly soluble quantum spin chains, more specifically, the spin-1/2 Ising chain in a longitudinal or transverse field and the spin-1/2 XX chain in a transverse field. In our study we calculate the lattice compressibility to show how its behavior indicates peculiarities in those quantum spin systems. Our goal is not to describe any specific material, but to analyze accurately model systems amenable to exact calculations. We believe that our analysis of correlation between lattice properties and peculiar behavior of spin system will have some qualitative merit in general.The paper is organized as follows. First, in Sec. II we illustrate a calculation scheme considering some wellknown example...

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Realization of the one-dimensional anisotropicXYmodel in a Tb(III)-W(V) chain compound

Cited by 7 publications

References 22 publications

Cyanido-Bridged {Ln^IIIW^V} Heterobinuclear Complexes: Synthesis and Magneto-Structural Study

Cyanido-Bridged {Ln^IIIW^V} Heterobinuclear Complexes: Synthesis and Magneto-Structural Study

Field Induced Slow Magnetic Relaxation in a Non Kramers Tb(III) Based Single Chain Magnet

Compressibility of deformable spin chains near quantum critical points

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Realization of the one-dimensional anisotropicXYmodel in a Tb(III)-W(V) chain compound

Cited by 7 publications

References 22 publications

Cyanido-Bridged {LnIIIWV} Heterobinuclear Complexes: Synthesis and Magneto-Structural Study

Cyanido-Bridged {LnIIIWV} Heterobinuclear Complexes: Synthesis and Magneto-Structural Study

Field Induced Slow Magnetic Relaxation in a Non Kramers Tb(III) Based Single Chain Magnet

Compressibility of deformable spin chains near quantum critical points

Contact Info

Product

Resources

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Cyanido-Bridged {Ln^IIIW^V} Heterobinuclear Complexes: Synthesis and Magneto-Structural Study

Cyanido-Bridged {Ln^IIIW^V} Heterobinuclear Complexes: Synthesis and Magneto-Structural Study