The Geometry and Electronic Structure of the Cu2+Polyhedra in Trirutile-Type Compounds Zn(Mg)1−xCuxSb2O6and the Dimorphism of CuSb2O6: A Solid State and EPR Study

Giere, E.-O.; Brahimi, A.; Deiseroth, H. J.; Reinen, D.

doi:10.1006/jssc.1997.7374

Cited by 32 publications

(43 citation statements)

References 17 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%

“…Four different twins can emerge from two different choices for elongation for each of the two magnetically inequivalent CuO 6 , as already discussed in Ref. 2 and evidenced in ESR measurements [4]. Using terminology of Ref.…”

Section: Esr Spectroscopymentioning

confidence: 73%

“…This phase transition lifts the degeneracy of four O2 oxygens which exists in the tetragonal phase. Above 380 K dynamic Jahn-Teller effect is realized in the tetragonal phase where higher vibronic states are occupied leading to fast dynamic exchange between the two different possibilities for elongation resulting in averaged compressed CuO 6 octahedra [2].…”

Section: Introductionmentioning

confidence: 99%

“…Below the phase transition static Jahn-Teller effect is realized through localization of vibronic states in two energy minima of the ground-state potential surface, corresponding to CuO 6 octahedra elongated along the Cu-O2a or the Cu-O2 bond [2]. 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: Esr Spectroscopymentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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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“…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 .…”

mentioning

confidence: 99%

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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Crystal growth experiments in the systems Ni₂MSbO₆ (M = Sc, In) using chemical vapour transport reactions: Ni₂InSbO₆ and NiSb₂O₆ crystals in the millimetre range

Weil

Mathieu

Nordblad

et al. 2013

Crystal Research and Technology

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Endothermic chemical vapour transport (CVT) reactions of Ni 2 MSbO 6 (M = Sc, In), using a temperature gradient T of 1313 → 1233 K and HgCl 2 , HgBr 2 , PtCl 2 or TeCl 4 as transport agents, led to growth of Ni 2 InSbO 6 single crystals in the millimetre range, whereas in the case of Ni 2 ScSbO 6 an incongruent dissolution of the solid in the source region was observed, leading to the formation of single crystals of the ternary phase NiSb 2 O 6 in the sink region. The crystal structures of the obtained crystals were refined from single crystal X-ray data with high precision [Ni 2 InSbO 6 : R3, Z = 3, a = 5.21640(10)Å, c = 14.0142(3)Å, 1279 structure factors, 33 parameters, R[F 2 > 2σ (F 2 )] = 0.0189; NiSb 2 O 6 : P4 2 /mnm, Z = 2, a = 4.63910(10)Å, c = 9.2182(2)Å, 500 structure factors, 19 parameters, R[F 2 > 2σ (F 2 )] = 0.0145]. Ni 2 InSbO 6 crystallizes in a corundum-related structure, NiSb 2 O 6 in the trirutile structure type. Spontaneous polarization and the ferroelectric transition temperature were estimated from the atomic arrangement and cation displacement along the polar axis in Ni 2 InSbO 6 . Magnetic measurements on Ni 2 InSbO 6 evidence an antiferromagnetic transition near T N = 74 K, with significant magnetic frustration.

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The Geometry and Electronic Structure of the Cu2+Polyhedra in Trirutile-Type Compounds Zn(Mg)1−xCuxSb2O6and the Dimorphism of CuSb2O6: A Solid State and EPR Study

Cited by 32 publications

References 17 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

Crystal growth experiments in the systems Ni₂MSbO₆ (M = Sc, In) using chemical vapour transport reactions: Ni₂InSbO₆ and NiSb₂O₆ crystals in the millimetre range

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The Geometry and Electronic Structure of the Cu2+Polyhedra in Trirutile-Type Compounds Zn(Mg)1−xCuxSb2O6and the Dimorphism of CuSb2O6: A Solid State and EPR Study

Cited by 32 publications

References 17 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

Crystal growth experiments in the systems Ni2MSbO6 (M = Sc, In) using chemical vapour transport reactions: Ni2InSbO6 and NiSb2O6 crystals in the millimetre range

Contact Info

Product

Resources

About

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

Crystal growth experiments in the systems Ni₂MSbO₆ (M = Sc, In) using chemical vapour transport reactions: Ni₂InSbO₆ and NiSb₂O₆ crystals in the millimetre range