Suppression of magnetic ordering in quasi-one-dimensional Fe<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow /><mml:mrow><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>Co<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow /><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>Nb<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML

Sarvezuk, P.W.C.; Kinast, Éder Júlio; Colin, Claire; Gusmao, Miguel Angelo Cavalheiro; Cunha, J.B.M. da; Isnard, O.

doi:10.1103/physrevb.83.174412

Cited by 24 publications

(15 citation statements)

References 28 publications

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“…Since T N is substantially smaller than θ CW , we have a large frustration index, as indicated in Table II. However, there is no geometric frustration here, in contrast to what was observed for columbites [16,19] with antiferromagnetically coupled FM Ising chains. In the present case, a low T N arises from the (quasi)low dimensionality and isotropy of the spin system, which can only order in three dimensions, so that the scale of T N is determined by the weakest exchange interaction.…”

Section: E Discussioncontrasting

confidence: 76%

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Low-dimensional magnetic properties of orthorhombic MnV2O6 : A nonstandard structure stabilized at high pressure

et al. 2017

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This paper presents the physical properties of a nonstandard orthorhombic form of MnV 2 O 6 , including a comparison with the isostructural orthorhombic niobate MnNb 2 O 6 , and with the usual MnV 2 O 6 monoclinic polymorph. Orthorhombic (P bcn) MnV 2 O 6 is obtained under extreme conditions of high pressure (6.7 GPa) and high temperature (800 • C). A negative Curie-Weiss temperature θ CW is observed, implying dominant antiferromagnetic interactions at high temperatures, in contrast to the positive θ CW of the monoclinic form. Specific-heat measurements are reported down to 1.8 K for all three compounds, and corroborate the magnetic-transition temperatures obtained from susceptibility data. Orthorhombic MnV 2 O 6 presents a transition to an ordered antiferromagnetic state at T N = 4.7 K. Its magnetic structure, determined by neutron diffraction, is unique among the columbite compounds, being characterized by a commensurate propagation vector k = (0,0, 1 2). It presents antiferromagnetic chains running along the c axis, but with a different spin pattern in comparison to the chains observed in MnNb 2 O 6. By a comparative discussion of our observations in this three compounds, we are able to highlight the interplay between competing interactions and dimensionality that yield their magnetic properties.

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Section: E Discussioncontrasting

confidence: 76%

“…3 at various temperatures. Their behavior is typical of isotropic antiferromagnetism, in contrast to other ANb 2 O 6 orthorhombic systems (A = Fe, Ni), which present Ising-like ferromagnetic chains, and show spin-flip transitions [16,19] in the ordered phase.…”

Section: B Magnetic Measurementsmentioning

confidence: 88%

Low-dimensional magnetic properties of orthorhombic MnV2O6 : A nonstandard structure stabilized at high pressure

et al. 2017

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“…The noncollinearity of the spin structure is dictated by the direction of the local Ising axis in the distorted AO 6 octahedra. In all of the studied solid solutions with random distribution of the A cations, the non-stoichiometric composition rapidly suppressed long-range magnetic order [236,[239][240][241]. This evidences a substantial drop of the average exchange strength both within and between the chains and a tendency for enhanced frustration among the interchain interactions as a result of disorder.…”

Section: S Inosovmentioning

confidence: 99%

Quantum magnetism in minerals

Inosov

2018

Advances in Physics

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The discovery of magnetism by the ancient Greeks was enabled by the natural occurrence of lodestone -a magnetized version of the mineral magnetite. Nowadays, natural minerals continue to inspire the search for novel magnetic materials with quantum-critical behaviour or exotic ground states such as spin liquids. The recent surge of interest in magnetic frustration and quantum magnetism was largely encouraged by crystalline structures of natural minerals realizing pyrochlore, kagome, or triangular arrangements of magnetic ions. As a result, names like azurite, jarosite, volborthite, and others, which were barely known beyond the mineralogical community a few decades ago, found their way into cutting-edge research in solid-state physics. In some cases, the structures of natural minerals are too complex to be synthesized artificially in a chemistry lab, especially in single-crystalline form, and there is a growing number of examples demonstrating the potential of natural specimens for experimental investigations in the field of quantum magnetism. On many other occasions, minerals may guide chemists in the synthesis of novel compounds with unusual magnetic properties. The present review attempts to embrace this quickly emerging interdisciplinary field that bridges mineralogy with low-temperature condensed-matter physics and quantum chemistry. PACS: 75.30.-m -intrinsic properties of magnetically ordered materials; 75.10.Jm -models of magnetic ordering, including quantum spin frustration; 91.60.Pn -magnetic properties of minerals.

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“…Indeed, the MTa 2 O 6 (M = Fe, Co, Ni) compounds present a two-dimensional antiferromagnetic behaviour (Eicher et al, 1986;Kremer & Greedan, 1998;Kinast et al, 2003Kinast et al, , 2010de Oliveira Neto et al, 2007Reimers et al, 1989;Muraoka et al, 1988), which has been extensively studied in the past few years, whereas the MNb 2 O 6 series of compounds present a one-dimensional ferromagnetic chain antiferromagnetically coupled Yeager, Morrish, Wanklyn & Garrad, 1977;Kobayashi et al, 1999Kobayashi et al, , 2001Hanawa et al, 1994;Heid et al, 1996;Sarvezuk et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

A new approach for the determination of multiple cation locations and ordering, using the example of natural and heat-treated columbites

Kinast¹,

Isnard²,

Cunha³

et al. 2011

J Appl Cryst

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A new approach is proposed to determine unambiguously the location of four cations within the crystal structure of a natural AB 2 O 6 columbite-type compound and derivatives, when submitted to order-disorder transitions caused by heat treatments. This method is based on the successive use of electron microprobe analysis to determine the cation concentration, Mö ssbauer spectroscopy to identify the Fe occupation, and a crystal structure determination of the samples combining Rietveld refinements of both neutron and X-ray diffraction. This approach is tested successfully to investigate (Fe, Mn, Nb, Ta) natural minerals as well as oxides obtained by heat treatment of the initial AB 2 O 6 columbite-type compound.

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Suppression of magnetic ordering in quasi-one-dimensional FexCo1−xNb
P.W.C. Sarvezuk
¹
,
Éder Júlio Kinast
²
,
Claire Colin
³

et al.

Cited by 24 publications

References 28 publications

Low-dimensional magnetic properties of orthorhombic MnV2O6 : A nonstandard structure stabilized at high pressure

Low-dimensional magnetic properties of orthorhombic MnV2O6 : A nonstandard structure stabilized at high pressure

Quantum magnetism in minerals

A new approach for the determination of multiple cation locations and ordering, using the example of natural and heat-treated columbites

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Suppression of magnetic ordering in quasi-one-dimensional FexCo1−xNbP.W.C. Sarvezuk1, Éder Júlio Kinast2, Claire Colin3 et al.

Cited by 24 publications

References 28 publications

Low-dimensional magnetic properties of orthorhombic MnV2O6 : A nonstandard structure stabilized at high pressure

Low-dimensional magnetic properties of orthorhombic MnV2O6 : A nonstandard structure stabilized at high pressure

Quantum magnetism in minerals

A new approach for the determination of multiple cation locations and ordering, using the example of natural and heat-treated columbites

Contact Info

Product

Resources

About

Suppression of magnetic ordering in quasi-one-dimensional FexCo1−xNb
P.W.C. Sarvezuk
¹
,
Éder Júlio Kinast
²
,
Claire Colin
³

et al.