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Paschen, S.; Pushin, D. A.; Schlatter, M.; Vonlanthen, P.; Ott, H. R.; Young, David P.; Fisk, Z.

doi:10.1103/physrevb.61.4174

Cited by 55 publications

(65 citation statements)

References 15 publications

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“…Two distinct components were resolved in the muon data, one oscillatory and one non-oscillatory, which arose from different kinds of magnetic environments [15]. The transition temperatures decrease with Ca content [3,16] and are completely suppressed for x 0.30 [17]. Electron microscopy data indicate the coexistence of insulating Ca-rich and metallic Eu-rich regions that percolate at x ≈ 0.30 [17].…”

Section: Introductionmentioning

confidence: 91%

“…In particular, the family R 1−x A x B 6 (A = magnetic rare earth) has attracted considerable interest due to the intriguing connections between their magnetic [2], transport [3], and optical properties [4,5]. The available crystallographic data indicate that these compounds are cubic with the unit cell belonging to the O h space group (a ≈ 4.19Å) [6].…”

Section: Introductionmentioning

confidence: 99%

“…Ferromagnetism in this case was found to arise from the half-filled 4f shell of Eu 2+ ions, whose localized spins account for the measured magnetic moment of ∼7 μ B /f.u. [7,11,3].…”

Section: Introductionmentioning

confidence: 99%

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Evidence for a subtle structural symmetry breaking in EuB₆

Martinho¹,

Rettori²,

Dalpian³

et al. 2009

J. Phys.: Condens. Matter

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This work presents a systematic Raman scattering study and first-principles calculations for the EuB 6 system. Evidence for the presence of an incipient (∼1×10 −4Å ) tetragonal symmetry break of its crystalline structure was found. Forbidden Raman modes at ω fRm(1) ∼ 1170 cm −1 , ω fRm(2) ∼ 1400 cm −1 , and ω fRm(3) ∼ 1500 cm −1 were observed. The tetragonal symmetry of ω fRm(2) and ω fRm(3) together with spin-polarized first-principles simulations of the structural and magnetic properties fully support such a break of symmetry. Our data and calculations explain the occurrence of ferromagnetism in Eu hexaborides, previously reported.

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Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Evidence for a subtle structural symmetry breaking in EuB₆

Martinho¹,

Rettori²,

Dalpian³

et al. 2009

J. Phys.: Condens. Matter

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“…Close to the magnetic transition, negative magnetoresistance (MR) values of up to 100% have been observed [5,6]. This decrease in resistivity is accompanied by a large decrease in the (negative) Hall coefficient [5] and an increase in the plasma frequency [7].…”

Section: Introductionmentioning

confidence: 96%

“…The Fermi surface consist of two ellipsoidal pockets, one electron-like and one holelike, centered on the X point in the Brillouin zone. The pockets contain very few carriers: Hall effect measurements yield n eff ∼ 10 −2 carriers per formula unit [5] at low temperatures. Small dilations of the boron octahedra cause overlap of the conduction and valence bands at the X points rendering EuB 6 semimetallic.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of evidence for magnetic polarons inEuB6

2004

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EuB6 is a low carrier density ferromagnet which exhibits large magnetoresistance, positive or negative depending on temperature. The formation of magnetic polarons just above the magnetic critical temperature has been suggested by spin-flip Raman scattering experiments. We find that the fact that EuB6 is a semimetal has to be taken into account to explain its electronic properties, including magnetic polarons and magnetoresistance.

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The Electronic Properties of Cation‐Deficient K _1—x B ₆ and the New Cubic Carbaboride KB ₅ C

Okatov

Ivanovskiĭ

2000

phys. stat. sol. (b)

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Introduction Considerable theoretical and experimental efforts [1,2] are devoted to metal the hexaborides (MB 6 , where M is rare-earth, alkaline and alkaline-earth metals) due to their interesting physical properties. Doping of the cation sublattice of MB 6 with metal atoms of a different type M H is a well-known method of modification of their properties. A large class of ternary hexaborides M 1Àx M H x B 6 has been obtained recently, for example, the rare-earth-metal-doped CaB 6 : Ca 1Àx La x B 6 , Ca 1Àx Eu x B 6 etc. [3,4]. The first ternary hexaborides containing substitutional impurities (C atoms) in the anion sublattice ± the so-called carbaborides NaB 5 C, KB 5 C ± have been synthesized recently [5]. Besides impurities, some hexaborides (for example, KB 6 , BaB 6 etc.) may contain structural defects of a different type, such as cationic vacancies [1]. In this communication we report the first theoretical findings concerning the electronic properties of cation-deficient potassium hexaborides K 1Àx B 6 and the new ternary phase ± carbaboride KB 5 C.Computational The cubic hexaboride KB 6 (space group O 1

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Electronic transport inEu1−xCaxB

Cited by 55 publications

References 15 publications

Evidence for a subtle structural symmetry breaking in EuB₆

Evidence for a subtle structural symmetry breaking in EuB₆

Evaluation of evidence for magnetic polarons inEuB6

The Electronic Properties of Cation‐Deficient K _1—x B ₆ and the New Cubic Carbaboride KB ₅ C

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Electronic transport inEu1−xCaxB

Cited by 55 publications

References 15 publications

Evidence for a subtle structural symmetry breaking in EuB6

Evidence for a subtle structural symmetry breaking in EuB6

Evaluation of evidence for magnetic polarons inEuB6

The Electronic Properties of Cation‐Deficient K 1—x B 6 and the New Cubic Carbaboride KB 5 C

Contact Info

Product

Resources

About

Evidence for a subtle structural symmetry breaking in EuB₆

Evidence for a subtle structural symmetry breaking in EuB₆

The Electronic Properties of Cation‐Deficient K _1—x B ₆ and the New Cubic Carbaboride KB ₅ C