Crystal growth and characterization of the magnetic properties of CuSb2O6

Prokofiev, A.; Ritter, Franz; Aßmus, W.; Gibson, B. J.; Kremer, R. K.

doi:10.1016/s0022-0248(02)02062-6

Cited by 25 publications

(44 citation statements)

References 14 publications

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“…The orientation of (7) • , in good agreement with previously published data [1]. Presence of multiple twins, reported by other authors [2][3][4][12][13][14], was also observed in our data.…”

Section: A X-ray Diffractionsupporting

confidence: 93%

“…Firstly, polycrystalline CuSb 2 O 6 powder was synthesized by solid state reaction described in detail elsewhere [3]. Secondly, CuSb 2 O 6 powders and HCl or TeCl 4 were mixed and sealed in a 24 mm diameter and 20 cm long evacuated quartz tube.…”

Section: Sample Characterizationmentioning

confidence: 99%

“…The phase transition from tetragonal to monoclinic phase is accompanied by a formation of crystallographic twins which is a result of two different choices for elongation of two crystallographically equivalent CuO 6 octahedra in the unit cell of CuSb 2 O 6 [3,4].…”

Section: Introductionmentioning

confidence: 99%

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Torque magnetometry study of magnetically ordered state and spin reorientation in the quasi-one-dimensionalS=12Heisenberg antiferromagnetCuSb2O6
Herak
¹
,
Žilić
²
,
Čalogović
³

et al. 2015
Phys. Rev. B
9
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4
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Antiferromagnetically ordered state of monoclinic quasi-one-dimensional S = 1/2 Heisenberg antiferromagnet CuSb 2 O 6 was studied combining torque magnetometry with phenomenological approach to magnetic anisotropy. This system is known to have a number of different twins in monoclinic β phase which differ in orientation of the two CuO 6 octahedra in unit cell resulting in different orientation of magnetic axes with respect to crystal axes for each twin. We performed torque measurements in magnetic fields H ≤ 0.8 T on a sample where certain type of twin was shown to be dominant by ESR spectroscopy. The measured data reveal that easy axis is the crystallographic b axis for this sample. Phenomenological magnetocrystalline anisotropy energy invariant to crystal symmetry operations was used to model spin axis direction in zero and finite magnetic field. Our model reproduces the value of the spin flop field H SF = 1.25 T found in literature. Combination of this approach with our torque results shows that the spin axis will flop in the direction of the maximal value of measured g tensor when magnetic field H > H SF is applied along easy axis direction. Our analysis of magnetocrystalline anisotropy energy predicts two possibilities for the easy axis direction in this system, b or a, connected to different crystallographic twins that can be realized in CuSb 2 O 6 . These results offer possibility to reconcile different reports of easy axis direction found in literature for this system and also nicely demonstrate how combination of torque magnetometry and phenomenological approach to magnetic anisotropy can be used to determine the value of the spin flop field and the direction of spin axis in antiferromagnets in both H < H SF and H > H SF by performing measurements in fields significantly smaller than H SF .

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Section: A X-ray Diffractionsupporting

confidence: 93%

Section: Sample Characterizationmentioning

confidence: 99%

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Torque magnetometry study of magnetically ordered state and spin reorientation in the quasi-one-dimensionalS=12Heisenberg antiferromagnetCuSb2O6
Herak
¹
,
Žilić
²
,
Čalogović
³

et al. 2015
Phys. Rev. B
9
0
4
0
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“…Surprisingly, susceptibility measurements done on both powder and single crystal samples of CuSb 2 O 6 fit extremly well over a large temperature range to a nearest-neighbor-only S = 1 2 Heisenberg 1D model with an exchange constant ranging from -86 K to -98 K. [10,12,13,14,15,16,17] Furthermore, all low temperature susceptibility measurements show a sharp drop at 8.5K [10,12,13,14,15,16], due to the onset of long range AFM ordering. [14,15,16] Thus, the contrast of the 2D lattice and the 1D magnetic behavior in CuSb 2 O 6 has been puzzling up to now.In this paper we present the combined results of the total energy and tight-binding model (TBM) calculations, which indicate an hitherto unobserved ground state originating from a competition between the in-and out-ofplaquette orbitals. Strong Coulomb correlation drives a surprising and unique orbital order in CuSb 2 O 6 , thereby leading to the strongly one-dimensional magnetic behavior with exchange integrals in good agreement with those deduced from experiments.…”

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confidence: 95%

Quasi-One-Dimensional Magnetism Driven by Unusual Orbital Ordering inCuSb2O6

2008

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Essentially all undoped cuprates exhibit a quasi-planar, fourfold Cu-O coordination responsible for the magnetically active antibonding 3d x 2 −y 2 -like state. Here, we present an electronic structure study for CuSb2O6 that reveals, in contrast, a half-filled 3d 3z 2 −r 2 orbital. This hitherto unobserved ground state originates from a competition of in-and out-of-plaquette orbitals where the strong Coulomb repulsion drives the surprising and unique orbital ordering. This, in turn, gives rise to an unexpected quasi one-dimensional magnetic behavior. Our results provide a consistent explanation of recent thermodynamical and neutron diffraction measurements. PACS numbers:Low dimensional systems have always been of fundamental interest to both experimentalists and theorists for their peculiar magnetic properties. In recent years, especially boosted by the discovery of the high-T c superconductivity in cuprates, low dimensional magnets related to this family of compounds have been widely studied. Low dimensional cuprates exhibit a large variety of exotic physical properties. This variety is a result of the complex interplay of different interactions; mainly covalency, ligand-fields and strong correlation effects.A nearly universal component of cuprate systems is a strongly elongated CuO 6 -octahedron[1] wherein the exotic behavior finds its origin in the deceivingly simple planar, half-filled Cu-O 4 orbital lying in its basal plane. Here, Cu 3d and O 2p states form a well separated, half filled pd − σ molecular-like orbital of x 2 − y 2 symmetry that is magnetically active. In general, the low-lying magnetic excitations, especially the magnetic ground state can be well described within this subspace of the whole Hilbert space. This way, the low-dimensional magnetic properties of a compound depend crucially on the arrangements of these Cu-O 4 units forming different networks, for instance (i) quasi 1D chains from isolated (i.e. In contrast to the vast majority of cuprates with a quasi-planar Cu(II) four-fold coordination, copper diantimonate CuSb 2 O 6 -first synthesized in early 1940's[9] -exhibits a nearly octahedral local environment of the Cu 2+ ions. The compound is green in color[9, 10], indicating insulating behavior with a gap size typical for cuprates. Although the compound undergoes a second order phase transition below 380 K from a tetragonal to a monoclinically distorted structure,[11] this quasioctahedral local environment is basically unchanged. The magnetic cation sublattice is that of the K 2 NiF 4 structure type, which includes many classic examples of square lattices exhibiting 2D antiferromagnetism (AFM), for instance the above mentioned La 2 CuO 4 . Surprisingly, susceptibility measurements done on both powder and single crystal samples of CuSb 2 O 6 fit extremly well over a large temperature range to a nearest-neighbor-only S = 1 2 Heisenberg 1D model with an exchange constant ranging from -86 K to -98 K. [10,12,13,14,15,16,17] Furthermore, all low temperature susceptibility measurements show a ...

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“…[65] Even the very stable rare earth arsenates can be transported this way. Transport occurs under addition of tellurium(IV) chloride, with intermediately formed TeOCl 2 being the actual transport agent: [66] (68) Most of the antimonates can be transported via their chlorination equilibria, for example using elemental chlorine: [67] (…”

Section: Oxides With Complex Anionsmentioning

confidence: 99%

Chemical Vapor Transport Reactions – Arguments for Choosing a Suitable Transport Agent

Binnewies

Schmidt

2017

Zeitschrift anorg allge chemie

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Abstract.A variety of processes of crystal growth proceeds via the gas phase. If the initial solid material is volatilized in a heterogeneous reaction under presence of a gaseous reactant, the transport agent, the term Chemical Vapor Transport Reaction (CVT) is applied. Crystallization processes by CVT are known for both elements, intermetallics, binary and complex oxides, halides, chalcogenides, and pnictides. Even if the formation of volatile halides is a common feature of almost

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Crystal growth and characterization of the magnetic properties of CuSb2O6

Cited by 25 publications

References 14 publications

Torque magnetometry study of magnetically ordered state and spin reorientation in the quasi-one-dimensionalS=12Heisenberg antiferromagnetCuSb2O6
Herak
¹
,
Žilić
²
,
Čalogović
³

et al. 2015
Phys. Rev. B
9
0
4
0
View full text Add to dashboard Cite

Torque magnetometry study of magnetically ordered state and spin reorientation in the quasi-one-dimensionalS=12Heisenberg antiferromagnetCuSb2O6
Herak
¹
,
Žilić
²
,
Čalogović
³

et al. 2015
Phys. Rev. B
9
0
4
0
View full text Add to dashboard Cite

Quasi-One-Dimensional Magnetism Driven by Unusual Orbital Ordering inCuSb2O6

Chemical Vapor Transport Reactions – Arguments for Choosing a Suitable Transport Agent

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Crystal growth and characterization of the magnetic properties of CuSb2O6

Cited by 25 publications

References 14 publications

Torque magnetometry study of magnetically ordered state and spin reorientation in the quasi-one-dimensionalS=12Heisenberg antiferromagnetCuSb2O6Herak1, Žilić2, Čalogović3 et al. 2015Phys. Rev. B9040View full textAdd to dashboardCite

Torque magnetometry study of magnetically ordered state and spin reorientation in the quasi-one-dimensionalS=12Heisenberg antiferromagnetCuSb2O6Herak1, Žilić2, Čalogović3 et al. 2015Phys. Rev. B9040View full textAdd to dashboardCite

Quasi-One-Dimensional Magnetism Driven by Unusual Orbital Ordering inCuSb2O6

Chemical Vapor Transport Reactions – Arguments for Choosing a Suitable Transport Agent

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Product

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Torque magnetometry study of magnetically ordered state and spin reorientation in the quasi-one-dimensionalS=12Heisenberg antiferromagnetCuSb2O6
Herak
¹
,
Žilić
²
,
Čalogović
³

et al. 2015
Phys. Rev. B
9
0
4
0
View full text Add to dashboard Cite

Torque magnetometry study of magnetically ordered state and spin reorientation in the quasi-one-dimensionalS=12Heisenberg antiferromagnetCuSb2O6
Herak
¹
,
Žilić
²
,
Čalogović
³

et al. 2015
Phys. Rev. B
9
0
4
0
View full text Add to dashboard Cite