Meet the spin doctors …

Ball, Philip

doi:10.1038/35010132

Cited by 159 publications

(104 citation statements)

References 11 publications

(10 reference statements)

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“…6 Third, a new field called spintronics has been developed around the possibilities of using the spin degree of freedom of the electron in solid-state electronics. 7 Fourth, EuO is an ideal system for testing new theories in magnetism, in particular the recent developments made on the Kondolattice model. The localized magnetic moments of the half-filled 4f -shell of the Eu atoms and the existence of a conduction band makes EuO an appropriate system to test the Kondo-lattice model.…”

Section: Introductionmentioning

confidence: 99%

Magnetic properties of pure and Gd-doped EuO probed by NMR

et al. 2005

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An Eu NMR study in the ferromagnetic phase of pure and Gd doped EuO was performed. A complete description of the NMR lineshape of pure EuO allowed for the influence of doping EuO with Gd impurities to be highlighted. The presence of a temperature dependent static magnetic inhomogeneity in Gd doped EuO was demonstrated by studying the temperature dependence of the lineshapes. The results suggest that the inhomogeneity in 0.6% Gd doped EuO is linked to colossal magnetoresistance. The measurement of the spin-lattice relaxation times as a function of temperature led to the determination of the value of the exchange integral J as a function of Gd doping. It was found that J is temperature independent and spatially homogeneous for all the samples and that its value increases abruptly with increasing Gd doping.

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Section: Introductionmentioning

confidence: 99%

Magnetic properties of pure and Gd-doped EuO probed by NMR

et al. 2005

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“…Since such metal-doped oxides are expected to display considerable magnetoresistivity, they are promising materials for "spintronics". [20,21] …”

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confidence: 99%

Molecular Encoding at the Nanoscale: From Complex Cubes to Bimetallic Oxides

Polarz¹,

Orlov²,

Berg³

et al. 2005

Angew Chem Int Ed

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Simple metal acetates react to give bimetallic heterocubanes of the type [${{{\rm {\rm M}}{{1\hfill \atop 4- y\hfill}}}}$${{{\rm {\rm M}}{{2\hfill \atop y\hfill}}}}$O4] (see structure, M1,2=Mn, Co, Ni, Zn), which in turn are precursors for the selective formation of bimetallic oxide nanoparticles with a controlled composition. The size of the particles can be controlled by adjusting the thermolysis temperature.

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“…These chains, which are stable even at high temperature and some of which keep their spin-dependent electronic properties even under moderate axial strain, hold the promise of potential applications in nanospintronics. PACS numbers: 61.46.+w, 75.50.Cc, 71.20.Be Spin-dependent electronic transport has promised revolutionary applications using giant-magneto-resistance in magnetic recording and nonvolatile memories [1,2,3]. Half-metals (HM) [4,5] are a class of materials, which exhibit spin-dependent electronic properties relevant to spintronics.…”

mentioning

confidence: 99%

“…Spin-dependent electronic transport has promised revolutionary applications using giant-magneto-resistance in magnetic recording and nonvolatile memories [1,2,3]. Half-metals (HM) [4,5] are a class of materials, which exhibit spin-dependent electronic properties relevant to spintronics.…”

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confidence: 99%

Half-metallic properties of atomic chains of carbon–transition-metal compounds

et al. 2005

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We found that magnetic ground state of one-dimensional atomic chains of carbon-transition metal compounds exhibit half-metallic properties. They are semiconductors for one spin-direction, but show metallic properties for the opposite direction. The spins are fully polarized at the Fermi level and net magnetic moment per unit cell is an integer multiple of Bohr magneton. The spindependent electronic structure can be engineered by changing the number of carbon and type of transition metal atoms. These chains, which are stable even at high temperature and some of which keep their spin-dependent electronic properties even under moderate axial strain, hold the promise of potential applications in nanospintronics. PACS numbers: 61.46.+w, 75.50.Cc, 71.20.Be Spin-dependent electronic transport has promised revolutionary applications using giant-magneto-resistance in magnetic recording and nonvolatile memories [1,2,3]. Half-metals (HM) [4,5] are a class of materials, which exhibit spin-dependent electronic properties relevant to spintronics. In HMs, due to broken spin-degeneracy, energy bands E n (k, ↑) and E n (k, ↓) split and each band accommodates one electron per k-point. Furthermore, they are semiconductor for one spin direction, but show metallic properties for the opposite spin direction. Accordingly, the difference between the number of electrons of different spin-orientations in the unit cell, N = N ↑ − N ↓ , must be an integer and hence the spin-polarization at the Fermi level,. This situation is in contrast with the ferromagnetic metals, where both spindirections contribute to the density of states at E F and spin-polarization P becomes less than 100%. Even though three-dimensional (3D) ferromagnetic Heusler alloys and transition-metal oxides exhibit HM properties [6], they are not yet appropriate for spintronics because of difficulties in controlling stoichiometry and the defect levels destroying the coherent spin-transport. Zinc-blende (ZB) HMs with high magnetic moment µ and high Curie temperature T c > 400K (such as CrAs, and CrSb in ZB structure) have been grown only in thin-film forms [7]. More recently, it has been predicted that four new ZB crystals can be HM at or near their respective equilibrium lattice constants [8].In this letter, we report that very simple and stable one-dimensional (1D) structures, such as linear atomic chains of carbon-transition metal compounds, i.e. C n (TM), show half-metallic properties. The prediction of half-metallic behavior in 1D atomic chains is new and of fundamental interest, in particular in the field of fermionic excitations with spin degree of freedom. Besides, the present finding may lead to potential applications in the rapidly developing field of nanospintronics, such as tunnelling magnetoresistance, spin valve, and nonvolatile magnetic devices.In earlier transport studies, the spin-direction of conduction electrons was generally disregarded, in spite of the fact that spin orientation of electrons decays much slower than their momentum [3]. Magnetic ground s...

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Meet the spin doctors …

Cited by 159 publications

References 11 publications

Magnetic properties of pure and Gd-doped EuO probed by NMR

Magnetic properties of pure and Gd-doped EuO probed by NMR

Molecular Encoding at the Nanoscale: From Complex Cubes to Bimetallic Oxides

Half-metallic properties of atomic chains of carbon–transition-metal compounds

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