Superconductors consisting of CuO2 and RuO2 layers

Bauernfeind, L.; Widder, W.; Braun, H. F.

doi:10.1007/bf00753929

Cited by 134 publications

(74 citation statements)

References 2 publications

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“…The temperature dependence of the magnetic susceptibility of RuSr 2  at temperatures between 25 K, 50 K and 300 K. The µSR spectra, for all temperatures and each composition, are best described using the function…”

Section: Resultsmentioning

confidence: 99%

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A μSR study of the magnetoresistive ruthenocuprates RuSr₂Nd_1.8−xY_0.2Ce_xCu₂O_10−δ(x= 0.95 and 0.80)

Mclaughlin

Attfield

Duijn

et al. 2011

J. Phys.: Condens. Matter

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Zero field muon spin relaxation (ZF-μSR) has been used to study the magnetic properties of the underdoped giant magnetoresistive ruthenocuprates (GMR) RuSr 2 Nd 1.8-x Y 0.2 Ce x Cu 2 O 10- (x = 0.95, 0.80). The results show a gradual loss of initial asymmetry A 0 at the ruthenium spin transition temperature, T Ru . At the same time the electronic relaxation rate,  shows a gradual increase with decreasing temperature below T Ru . These results have been interpreted as evidence for Cu spin cluster formation below T Ru . These magnetically ordered clusters grow as the temperature is decreased thus causing the initial asymmetry to decrease slowly. GMR is observed over a wide temperature range in the materials studied and the magnitude increases as the temperature is reduced from T Ru to 4 K which suggests a relation between Cu spin cluster size and -MR.

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Section: Resultsmentioning

confidence: 99%

“…The RuSr 2 (T c = 35 K) has recently been reported [8]. Neutron diffraction studies have shown that below the Ru spin ordering temperature-T Ru , neighbouring spins align in an antiparallel arrangement in the ab plane while both antiferromagnetic and ferromagnetic alignment along c is observed [8].…”

Section: Introductionmentioning

confidence: 99%

A μSR study of the magnetoresistive ruthenocuprates RuSr₂Nd_1.8−xY_0.2Ce_xCu₂O_10−δ(x= 0.95 and 0.80)

Mclaughlin

Attfield

Duijn

et al. 2011

J. Phys.: Condens. Matter

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“…This sample was prepared using the same process described in the Experimental Section but a different person prepared it. Previous studies on RuSr 2 GdCu 2 O 8 have shown that the semiconductor-like upturn and the zero resistance temperature are critically dependent on the sample processing [5,14]. A High resolution TEM study on RuSr 2 GdCu 2 O 8 has shown that prolonged thermal treatment at 1060 °C removes most of the multidomain structure, consisting predominantly of 90 degrees rotations, as well as significantly reducing the semiconductor-like upturn [5].…”

Section: Results and Analysesmentioning

confidence: 99%

Transport and microwave study of superconducting and magneticRuSr2EuCu2O
Požek
¹
,
Dulčić
²
,
Paar
³

et al. 2001
Phys. Rev. B
26
0
22
0
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We have performed susceptibility, thermopower, dc resistance and microwave measurements on RuSr 2 EuCu 2 O 8 . This compound has recently been shown to display the coexistence of both superconducting and magnetic order. We find clear evidence of changes in the dc and microwave resistance near the magnetic ordering temperature (132 K). The intergranular effects were separated from the intragranular effects by performing microwave measurements on a sintered ceramic sample as well as on a powder sample dispersed in an epoxy resin. We show that the data can be interpreted in terms of the normal-state resistivity

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“…[1,2] The interest in these materials was triggered by the observation of coexisting superconductivity (SC) and long-range magnetic order, including weak-ferromagnetism (wFM), at moderately high temperatures (T). [3,4] The occurrence of long-range magnetic order has been determined by means of magnetic susceptibility, and muon spin relaxation, while details of the magnetic and crystal structure have been studied by neutron diffraction.…”

Section: Introductionmentioning

confidence: 99%

Superconductivity in magnetically ordered Ru1-xIr xSr2GdCu2O8 compounds

et al. 2003

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We have performed a systematic study of the structural, transport, and magnetic properties of polycrystalline samples of the magnetic superconductors Ru1−xIrxSr2GdCu2O8; x = 0, 0.02, 0.05, 0.10, and 0.15. The samples were prepared by solid state reaction and sintered at 1060 • C for 72 h under O 2 flow. X-ray diffraction analysis shows that all samples are nearly single phase and that the lattice parameters are independent of Ir content. Transport properties measurements revealed that the Ru substitution by Ir results in a decrease of Tc,onset from ∼ 50 K (x = 0) to ∼ 30 K (x = 0.10). Further addition of Ir (x > 0.10) causes an evolution from metallic to nonmetallic behavior of ρ(T). We have also found that magnetic order develops in the undoped Ru-1212 materials near T M ∼ 130 K. This temperature decreases linearly with increasing Ir content at the rate of ∼ -1.6 K / Ir at.%, suggesting that Ir effectively substitutes Ru in the RuO planes. A subtle drop in ρ(T) is observed close to T M , probably due to the suppression of the spin-flip scattering. The magnetoresistivity measurements revealed that the temperature T c,zero , in which ρ(T) ∼ 0, decreases rapidly for low applied magnetic fields (H < 2 T), and that this drop becomes much less pronounced in higher magnetic fields (2 ≤ H ≤ 18 T). The appreciable broadening of ρ(T) curves at low magnetic fields is reminiscent of the behavior in high-T c materials showing granular behavior, as for example in Sm1.85Ce0.15CuO4−y.

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Superconductors consisting of CuO2 and RuO2 layers

Cited by 134 publications

References 2 publications

A μSR study of the magnetoresistive ruthenocuprates RuSr₂Nd_1.8−xY_0.2Ce_xCu₂O_10−δ(x= 0.95 and 0.80)

A μSR study of the magnetoresistive ruthenocuprates RuSr₂Nd_1.8−xY_0.2Ce_xCu₂O_10−δ(x= 0.95 and 0.80)

Transport and microwave study of superconducting and magneticRuSr2EuCu2O
Požek
¹
,
Dulčić
²
,
Paar
³

et al. 2001
Phys. Rev. B
26
0
22
0
View full text Add to dashboard Cite

Superconductivity in magnetically ordered Ru1-xIr xSr2GdCu2O8 compounds

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Superconductors consisting of CuO2 and RuO2 layers

Cited by 134 publications

References 2 publications

A μSR study of the magnetoresistive ruthenocuprates RuSr2Nd1.8−xY0.2CexCu2O10−δ(x= 0.95 and 0.80)

A μSR study of the magnetoresistive ruthenocuprates RuSr2Nd1.8−xY0.2CexCu2O10−δ(x= 0.95 and 0.80)

Transport and microwave study of superconducting and magneticRuSr2EuCu2OPožek1, Dulčić2, Paar3 et al. 2001Phys. Rev. B260220View full textAdd to dashboardCite

Superconductivity in magnetically ordered Ru1-xIr xSr2GdCu2O8 compounds

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A μSR study of the magnetoresistive ruthenocuprates RuSr₂Nd_1.8−xY_0.2Ce_xCu₂O_10−δ(x= 0.95 and 0.80)

A μSR study of the magnetoresistive ruthenocuprates RuSr₂Nd_1.8−xY_0.2Ce_xCu₂O_10−δ(x= 0.95 and 0.80)

Transport and microwave study of superconducting and magneticRuSr2EuCu2O
Požek
¹
,
Dulčić
²
,
Paar
³

et al. 2001
Phys. Rev. B
26
0
22
0
View full text Add to dashboard Cite