Muon Spin Relaxation and Susceptibility Studies of the Pure and Diluted Spin<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mfrac><mml:mn>1</mml:mn><mml:mn>2</mml:mn></mml:mfrac></mml:math>Kagomé-Like Lattice System<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mo stretchy="false">(</mml:mo><mml:msub><mml:mrow><mml:mi mathvariant="normal">C</mml:mi><mml:mi mathvariant="normal">u</mml:mi></mml:mrow><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mro

Fukaya, A.; Fudamoto, Y.; Gat, I. M.; Ito, T.; Larkin, M.; Savici, A. T.; Uemura, Yohei; Kyriakou, P. P.; Luke, G. M.; Rovers, M. T.; Kojima, Kenji; Keren, Amit; Hanawa, Masafumi; Hiroi, Zenji

doi:10.1103/physrevlett.91.207603

Cited by 55 publications

(50 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We conclude therefore that the observed magnetic scattering cross section is not consistent with a planar kagome-like magnetic ground state, but rather a 3d antiferromagnetically correlated structure, with magnetic moments on all the Co sites. This is consistent with the observation of magnetic moments on all of the Co sites in ordered stoichiometric YBaCo 4 …”

Section: Xyz Neutron Polarization Analysis Studysupporting

confidence: 92%

“…37 From our diffraction data there is no evidence for such a strong distortion. Also, it was recently concluded from a combined experimental and theoretical x-ray absorption spectroscopy study of YBaCo 4 is a mixed-valence compound and the kagome layers must contain a distribution of mixed S = 3/2 and S = 2 spins. This mixed-valence character adds to the disorder already present owing to the Ca substitution and consequent exchange pathway disorder.…”

Section: Discussionmentioning

confidence: 99%

“…If the couplings are sufficiently two dimensional in character, long-range order at low temperature is suppressed and the effects of frustration can be studied experimentally. Topical materials in this class include S = 1/2 systems such as volborthite, Cu 3 V 2 O 7 (OH) 2 · 2H 2 O, [3][4][5] and herbertsmithite, ZnCu 3 (OH) 6 Cl 2 , 6-10 as well as others with a higher spin quantum number, such as the S = 5/2 jarosites AFe 3 (OH) 6 (SO 4 ) 2 , 11,12 and the double kagome layer (termed pyrochlore slab) compounds with S = 3/2-SrCr 9x Ga 12−9x O 19 (SCGO) (Refs. [13][14][15][16][17] and Ba 2 Sn 2 ZnCr 7x Ga 10−7x O 22 (BSZCGO).…”

Section: Introductionmentioning

confidence: 99%

“…Recent studies of 114 cobaltite compounds with the composition YBaCo 4 O x (7 x 8) and substituted variants have revealed the interesting frustrated properties and intricate chemistry of these compounds. [28][29][30][31][32][33][34][35][36][37][38] The substitutionally disordered system, Y 0.5 Ca 0.5 BaCo 4 O 7 , 39 was proposed as a new kagome material involving Co 2+ (S = 3/2) ions.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Spin dynamics, short-range order, and spin freezing inY0.5Ca0.5Ba

et al. 2011

View full text Add to dashboard Cite

Y 0.5 Ca 0.5 BaCo 4 O 7 was recently introduced as a possible candidate for capturing some of the predicted classical spin kagome ground-state features. Stimulated by this conjecture, we have taken up a more complete study of the spin correlations in this compound with neutron scattering methods on a powder sample characterized with high-resolution neutron diffraction and the temperature dependence of magnetic susceptibility and specific heat. We have found that the frustrated near-neighbor magnetic correlations involve not only the kagome planes but concern the full Co sublattice, as evidenced by the analysis of the wave-vector dependence of the short-range order. We conclude from our results that the magnetic moments are located on the Co sublattice as a whole and that correlations extend beyond the two-dimensional kagome planes. We identify intriguing dynamical properties, observing high-frequency fluctuations with a Lorentzian linewidth 20 meV at ambient temperature. On cooling a low-frequency (∼1 meV) dynamical component develops alongside the high-frequency fluctuations, which eventually becomes static at temperatures below T ≈ 50 K. The high-frequency response with an overall linewidth of ∼10 meV prevails at T 2 K, coincident with a fully elastic short-range-ordered contribution.

show abstract

Section: Xyz Neutron Polarization Analysis Studysupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Spin dynamics, short-range order, and spin freezing inY0.5Ca0.5Ba

et al. 2011

View full text Add to dashboard Cite

show abstract

“…The average of (2J 1 + J 2 )/3 was estimated to be 77 K by a high-temperature series expansion fit of the magnetic susceptibility 9 . The nature of the magnetic ground state of volborthite has not been understood in detail yet, but is suggested to be unusual, with strong fluctuations at low temperature (LT) and short-range spin correlations [10][11][12][13][14][15] . One of the reasons for this ambiguity has been the unavailability of single crystals until now.…”

mentioning

confidence: 99%

Orbital switching in a frustrated magnet

et al. 2012

View full text Add to dashboard Cite

The orbital is one of the four fundamental degrees of freedom in a solid, besides spin, charge and lattice. In transition metal compounds, it is usually the d orbitals which play deciding roles in determining the crystallographic and physical properties. Here we report the discovery of a unique structural transition in single crystals of the spin-1/2 quasi-kagomé antiferromagnet volborthite, Cu 3 V 2 o 7 (oH) 2 ·2H 2 o, whereby the unpaired electron 'switches' from one d orbital to another upon cooling. This is not a conventional orbital order-disorder transition, but rather an orbital switching that has not previously been observed. The structural transition is found to profoundly affect the magnetic properties of volborthite, because magnetic interactions between Cu spins in the kagomé lattice are considerably modified by the orbital switching. This finding provides us with an interesting example to illustrate the intimate interplay between the orbital degree of freedom and competing magnetic interactions in a frustrated magnet.

show abstract

Kagomé Antiferromagnets: Materials Vs. Spin Liquid Behaviors

Mendels

Wills

2010

Introduction to Frustrated Magnetism

View full text Add to dashboard Cite

Muon Spin Relaxation and Susceptibility Studies of the Pure and Diluted Spin12Kagomé-Like Lattice System(Cux

Cited by 55 publications

References 21 publications

Spin dynamics, short-range order, and spin freezing inY0.5Ca0.5Ba

Spin dynamics, short-range order, and spin freezing inY0.5Ca0.5Ba

Orbital switching in a frustrated magnet

Kagomé Antiferromagnets: Materials Vs. Spin Liquid Behaviors

Contact Info

Product

Resources

About