Magnetic ordering of Nd in (Nd,Ce<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mo>)</mml:mo></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">CuO</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub></mml:mrow></mml:math>

Lynn, J. W.; Sumarlin, I. W.; Skanthakumar, S.; Wh, Li; Shelton, R.N.; Peng, J. L.; Fisk, Z.; Cheong, S. W.

doi:10.1103/physrevb.41.2569

Cited by 145 publications

(28 citation statements)

References 17 publications

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“…WZNW model with matrix field h. We shift h-field by g using the identity (6). This yields the massive sine-Gordon theory and the WZNW action:…”

Section: Extracting the Resultsmentioning

confidence: 99%

“…The response of a spin system near quantum criticality often exhibits fascinating impurity-driven physics, such as found in lightly doped cuprates and related two-dimensional Mott insulators [4,5]. On the other hand, in some complex alloys with rare earths there is a lattice of macroscopically many magnetic rare-earth "impurity" spins even for ideal stoichiometric materials, and they can dramatically modify the spin dynamics of the host magnetic 3d ions [6,7]. Such cooperative coupling of Ni 2+ spins to paramagnetic rare-earths induces criticality in the Haldane (S=1) chain antiferromagnet R 2 BaNiO 5 , leading to magnetic order at a finite temperature [7,8].…”

Section: Introductionmentioning

confidence: 99%

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Heisenberg necklace model in a magnetic field

Tsvelik

Zaliznyak

2016

Phys. Rev. B

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We study the low-energy sector of the Heisenberg Necklace model. Using the field theory methods, we estimate how the coupling of the electronic spins with the paramagnetic Kondo spins affects the overall spins dynamics and evaluate its dependence on a magnetic field. We are motivated by the experimental realizations of the spin-1/2 Heisenberg chains in SrCuO 2 and Sr 2 CuO 3 cuprates, which remain one-dimensional Luttinger liquids down to temperatures much lower than the inchain exchange coupling, J. We consider the perturbation of the energy spectrum caused by the interaction, γ, with nuclear spins (I = 3/2) present on the same sites. We find that the resulting Necklace model has a characteristic energy scale, Λ ∼ J 1/3 (γI) 2/3 , at which the coupling between (nuclear) spins of the necklace and the spins of the Heisenberg chain becomes strong. This energy scale is insensitive to a magnetic field, B. For µ B B > Λ we find two gapless bosonic modes that have different velocities, whose ratio at strong fields approaches a universal number, √ 2 + 1.

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“…WZNW model with matrix field h. We shift h-field by g using the identity (6). This yields the massive sine-Gordon theory and the WZNW action:…”

Section: Extracting the Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Heisenberg necklace model in a magnetic field

Tsvelik

Zaliznyak

2016

Phys. Rev. B

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“…In NdFeO 3 [24] and Nd 2 CuO 4 [28,29] the Nd 3þ sublattice is subjected not only to Nd-Nd interactions but also to Nd-Fe and Nd-Cu interactions, while in the case of NdGaO 3 [6] the Nd 3þ magnetic and nuclear moments ordering is due to Nd-Nd interactions only. In spite of the different magnetic orderings in these materials, the magnetic hyperfine coupling model (see Eqs.…”

Section: Discussionmentioning

confidence: 97%

Nuclear ordering and excitations in

Przeniosło

Sosnowska

Frick

2006

Journal of Magnetism and Magnetic Materials

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“…3, the ͑1 0 0͒ and ͑1 0 1͒ Bragg peaks follow the same trend with ͑i͒ weak intensity between T ‫ء‬ and T Nd , and ͑ii͒ a strong but smooth and monotonic intensity increase below T Nd without reaching saturation down to the lowest measured temperature of 1.5 K. Both low-temperature transitions are reminiscent of Nd 2 CuO 4 , where the Nd-Cu coupling leads to abrupt changes in the Cu spin structure along with a significant induced Nd moment before the Nd spontaneously orders. [25][26][27] It will be interesting to determine theoretically if a similar type of Fe-Nd coupling is the origin of this behavior in NdFeAsO.…”

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confidence: 99%

Interplay of Fe and Nd magnetism in NdFeAsO single crystals

et al. 2010

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The structural and magnetic phase transitions have been studied on NdFeAsO single crystals by neutron and x-ray diffraction complemented by resistivity and specific heat measurements. Two low-temperature phase transitions have been observed in addition to the tetragonal-to-orthorhombic transition at TS ∼ 142 K and the onset of antiferromagnetic (AFM) Fe order below TN ∼ 137 K. The Fe moments order AFM in the well-known stripe-like structure in the (ab) plane, but change from AFM to ferromagnetic (FM) arrangement along the c direction below T * ∼ 15 K accompanied by the onset of Nd AFM order below T Nd ∼ 6 K with this same AFM configuration. The iron magnetic order-order transition in NdFeAsO accentuates the Nd-Fe interaction and the delicate balance of c-axis exchange couplings that results in AFM in LaFeAsO and FM in CeFeAsO and PrFeAsO.

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Magnetic ordering of Nd in (Nd,Ce)2CuO4

Cited by 145 publications

References 17 publications

Heisenberg necklace model in a magnetic field

Heisenberg necklace model in a magnetic field

Nuclear ordering and excitations in

Interplay of Fe and Nd magnetism in NdFeAsO single crystals

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