Stewart Barnes

Professor

  • 2869 Citations
1971 …2018
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Research Output 1971 2018

  • 2869 Citations
  • 99 Article
  • 7 Conference contribution
  • 1 Chapter
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Article
1988
51 Citations (Scopus)

Comparison of the EPR of the antiferromagnets Y2BaCuO5 and Gd2BaCuO5 and the high Tc superconductors YBa2Cu3O7 and GdBa2Cu3O7

Mehran, F., Barnes, S., Giess, E. A. & McGuire, T. R., Jan 1 1988, In : Solid State Communications. 67, 1, p. 55-59 5 p.

Research output: Contribution to journalArticle

Superconducting materials
Paramagnetic resonance
magnetic permeability
Magnetic susceptibility
electron paramagnetic resonance
38 Citations (Scopus)

Observation by electron spin resonance of a pseudo-cubic site in YBa2Cu3O7-x.

Mehran, F., Barnes, S., McGuire, T. R., Dinger, T. R., Kaiser, D. L. & Holtzberg, F., 1988, In : Solid State Communications. 66, 3, p. 299-302 4 p.

Research output: Contribution to journalArticle

Paramagnetic resonance
electron paramagnetic resonance
Single crystals
Linewidth
Superconducting materials
8 Citations (Scopus)

Theory of the Jahn-Teller-Kondo effect

Barnes, S., 1988, In : Physical Review B. 37, 7, p. 3671-3674 4 p.

Research output: Contribution to journalArticle

Kondo effect
Ground state
Ions
orbitals
ground state
1987
28 Citations (Scopus)

Electron paramagnetic resonance of Gd3+ ions in the superconductor GdBa2Cu3Ox

Mehran, F., Barnes, S., Tsuei, C. C. & McGuire, T. R., 1987, In : Physical Review B. 36, 13, p. 7266-7268 3 p.

Research output: Contribution to journalArticle

Superconducting materials
Paramagnetic resonance
electron paramagnetic resonance
Ions
ions
4 Citations (Scopus)

Observation of Al2O3: Cr3+ magnetic resonance via solitons in long Josephson junctions

Mehran, F., Barnes, S., Chi, C. C., Sandstrom, R. L. & Umbach, C. P., 1987, In : Physical Review B. 36, 13, p. 7281-7284 4 p.

Research output: Contribution to journalArticle

Magnetic resonance
Solitons
Josephson junctions
Paramagnetic resonance
magnetic resonance
74 Citations (Scopus)

Paramagnetic resonance of Cu2+ ions in the superconductor Y0.2Ba0.8CuOx

Mehran, F., Barnes, S., McGuire, T. R., Gallagher, W. J., Sandstrom, R. L., Dinger, T. R. & Chance, D. A., 1987, In : Physical Review B. 36, 1, p. 740-742 3 p.

Research output: Contribution to journalArticle

paramagnetic resonance
Superconducting materials
Paramagnetic resonance
Ions
ions
1986
11 Citations (Scopus)

Derivation of exact results for the single-ion Kondo problem with the use of diagrammatic methods

Barnes, S., 1986, In : Physical Review B. 33, 5, p. 3209-3246 38 p.

Research output: Contribution to journalArticle

derivation
Impurities
Ions
impurities
ions
1 Citation (Scopus)

ESR in situ with a Josephson tunnel junction

Bures, K. D., Baberschke, K. & Barnes, S., 1986, In : Journal of Magnetism and Magnetic Materials. 54-57, PART 3, p. 1415-1417 3 p.

Research output: Contribution to journalArticle

Tunnel junctions
tunnel junctions
Josephson junctions
crystal field theory
Paramagnetic resonance
2 Citations (Scopus)

New exact diagram approach to the Kondo problem

Barnes, S., 1986, In : Journal of Magnetism and Magnetic Materials. 54-57, PART 3, p. 1243-1244 2 p.

Research output: Contribution to journalArticle

Feynman diagrams
Specific heat
Physics
diagrams
specific heat
8 Citations (Scopus)

Theory of in situ measurement of wave-vector-dependent dynamic susceptibility and ESR spectroscopy using the ac Josephson effect

Barnes, S. & Mehran, F., 1986, In : Physical Review B. 34, 7, p. 4537-4551 15 p.

Research output: Contribution to journalArticle

Electron spin resonance spectroscopy
Josephson effect
in situ measurement
electron paramagnetic resonance
Superconducting materials
1985
8 Citations (Scopus)

Solution of the Kondo problem by diagrammatic methods

Barnes, S., 1985, In : Physical Review Letters. 55, 20, p. 2192-2195 4 p.

Research output: Contribution to journalArticle

scaling
approximation
1984
10 Citations (Scopus)

ESR and magnetization of the spin-glass CuMn at low concentrations

Hoekstra, F. R., Nieuwenhuys, G. J., Baberschke, K. & Barnes, S., 1984, In : Physical Review B. 29, 3, p. 1292-1299 8 p.

Research output: Contribution to journalArticle

Spin glass
spin glass
Paramagnetic resonance
low concentrations
Magnetization
15 Citations (Scopus)

ESR in situ with a Josephson tunnel junction

Baberschke, K., Bures, K. D. & Barnes, S., 1984, In : Physical Review Letters. 53, 1, p. 98-101 4 p.

Research output: Contribution to journalArticle

tunnel junctions
Josephson junctions
crystal field theory
electron paramagnetic resonance
spectrometers
8 Citations (Scopus)

ESR relaxation in spin glasses

Barnes, S., 1984, In : Physical Review B. 30, 7, p. 3944-3950 7 p.

Research output: Contribution to journalArticle

Spin glass
spin glass
Paramagnetic resonance
cusps
divergence

Microscopic formulation for a Josephson array

Barnes, S., 1984, In : Journal of Physics F: Metal Physics. 14, 8, p. 1923-1930 8 p., 021.

Research output: Contribution to journalArticle

Free energy
free energy
formulations
Feynman diagrams
Ground state
16 Citations (Scopus)

On the field dependence of the spin glass susceptibility peak

Barbara, B., Malozemoff, A. P. & Barnes, S., 1984, In : Journal of Applied Physics. 55, 6, p. 1655-1657 3 p.

Research output: Contribution to journalArticle

spin glass
magnetic permeability
cusps
temperature
16 Citations (Scopus)

Scaling approach to spin-glass phenomena

Barnes, S., Malozemoff, A. P. & Barbara, B., 1984, In : Physical Review B. 30, 5, p. 2765-2768 4 p.

Research output: Contribution to journalArticle

Spin glass
Freezing
spin glass
Free energy
scaling
1983
8 Citations (Scopus)

8(3) resonance in ESR of (ErY)Al2 single crystals

Döbler, U., Baberschke, K. & Barnes, S., 1983, In : Physical Review B. 27, 11, p. 6593-6607 15 p.

Research output: Contribution to journalArticle

Paramagnetic resonance
Exchange interactions
Single crystals
Impurities
impurities
2 Citations (Scopus)

An ESR study of the dynamics of local moments and conduction electrons in ScGd single crystals

Barnes, S., Baberschke, K. & Nagel, J., 1983, In : Journal of Physics F: Metal Physics. 13, 2, p. 347-355 9 p., 010.

Research output: Contribution to journalArticle

conduction electrons
Paramagnetic resonance
Single crystals
Impurities
moments
2 Citations (Scopus)
oscillations
4 Citations (Scopus)

Experimental investigation of the magnetic behavior of superconducting- normal-superconducting Josephson junctions

Bures, K., Barnes, S. & Baberschke, K., 1983, In : Journal of Applied Physics. 54, 12, p. 7073-7077 5 p.

Research output: Contribution to journalArticle

Josephson junctions
current density
high current
electric potential
Josephson effect
31 Citations (Scopus)

Magnetic resonance in the spin-glass (LaGd)Al2

Zomack, M., Baberschke, K. & Barnes, S., 1983, In : Physical Review B. 27, 7, p. 4135-4148 14 p.

Research output: Contribution to journalArticle

Spin glass
Magnetic resonance
spin glass
magnetic resonance
magnetic permeability
69 Citations (Scopus)

Non-mean-field interpretation of the irreversibility line in spin-glasses

Malozemoff, A. P., Barnes, S. & Barbara, B., 1983, In : Physical Review Letters. 51, 18, p. 1704-1707 4 p.

Research output: Contribution to journalArticle

spin glass
crossovers
magnetic permeability
exponents
scaling
60 Citations (Scopus)

Theory of Josephson-type oscillations in a moving charge-density wave

Barnes, S. & Zawadowski, A., 1983, In : Physical Review Letters. 51, 11, p. 1003-1006 4 p.

Research output: Contribution to journalArticle

oscillations
wave scattering
narrowband
impurities
scattering
1981
11 Citations (Scopus)

Electron-spin-resonance modes and the Edwards-Anderson theory of the spin-glass state

Barnes, S., 1981, In : Physical Review Letters. 47, 22, p. 1613-1616 4 p.

Research output: Contribution to journalArticle

spin glass
electron paramagnetic resonance
anisotropy
symmetry
magnetization
5 Citations (Scopus)

Electron spin resonance modes in a spin-glass

Barnes, S., 1981, In : Physica B+C. 108, 1-3, p. 771-772 2 p.

Research output: Contribution to journalArticle

Spin glass
Paramagnetic resonance
Anisotropy
Hamiltonians
Single crystals
4 Citations (Scopus)
spin glass
ground state
magnons
anisotropy
energy
11 Citations (Scopus)

Spin waves in a spin glass

Barnes, S., 1981, In : Journal of Physics F: Metal Physics. 11, 10, 004.

Research output: Contribution to journalArticle

Spin waves
Spin glass
spin glass
magnons
Anisotropy
336 Citations (Scopus)

Theory of electron spin resonance of magnetic ions in metals

Barnes, S., Jan 1 1981, In : Advances in Physics. 30, 6, p. 801-938 138 p.

Research output: Contribution to journalArticle

electron paramagnetic resonance
Kondo effect
metals
crystal field theory
ions
1980
18 Citations (Scopus)

Crystal fields and exchange parameters in LaAl2: Eu2+ and LaAl2: Gd3+ single crystals

Baberschke, K., Bachor, B. & Barnes, S., 1980, In : Physical Review B. 21, 7, p. 2666-2673 8 p.

Research output: Contribution to journalArticle

crystal field theory
Paramagnetic resonance
fine structure
Single crystals
Crystals
14 Citations (Scopus)

Electron paramagnetic resonance of Gd3+ in platinum

Hardiman, M., Pellisson, J., Barnes, S., Bisson, P. E. & Peter, M., 1980, In : Physical Review B. 22, 5, p. 2175-2194 20 p.

Research output: Contribution to journalArticle

Platinum
Paramagnetic resonance
electron paramagnetic resonance
platinum
Single crystals
2 Citations (Scopus)

ESR of Eu2+: LaAl2 single crystals: Crystal fields and the effective exchange interaction

Baberschke, K., Barnes, S. & Bachor, B., 1980, In : Journal of Magnetism and Magnetic Materials. 15-18, PART 2, p. 733-734 2 p.

Research output: Contribution to journalArticle

Exchange interactions
crystal field theory
Paramagnetic resonance
fine structure
Single crystals
3 Citations (Scopus)
Josephson junctions
magnetic fields
critical current
current density
1978
1 Citation (Scopus)

Abstract: Crystal field splitting and spin-spin interaction of Eu2+ and Gd3+ in LaAl2 single crystals

Baberschke, K., Barnes, S. & Bachor, B., 1978, In : Journal of Applied Physics. 49, 3, p. 1451 1 p.

Research output: Contribution to journalArticle

crystal field theory
single crystals
interactions
41 Citations (Scopus)

Anomalous crystal-field splittings of lanthanide S-states in metals

Barnes, S., Baberschke, K. & Hardiman, M., 1978, In : Physical Review B. 18, 6, p. 2409-2421 13 p.

Research output: Contribution to journalArticle

Lanthanoid Series Elements
Rare earth elements
crystal field theory
Metals
Crystals
4 Citations (Scopus)
1977

Localizing pseudopotential for local moments and certain virtual bound states

Barnes, S., 1977, In : Physical Review B. 16, 10, p. 4378-4381 4 p.

Research output: Contribution to journalArticle

pseudopotentials
moments
146 Citations (Scopus)

New method for the Anderson model. II. the U=0 limit

Barnes, S., 1977, In : Journal of Physics F: Metal Physics. 7, 12, p. 2637-2647 11 p., 022.

Research output: Contribution to journalArticle

expansion
4 Citations (Scopus)
Josephson junctions
Superconducting materials
Spectroscopy
Impurities
impurities
1976
24 Citations (Scopus)

Dynamic EPR susceptibility for the 'ionic' approach to the Anderson model

Barnes, S., 1976, In : Journal of Physics F: Metal Physics. 6, 1, p. 115-130 16 p., 015.

Research output: Contribution to journalArticle

Paramagnetic resonance
magnetic permeability
Impurities
conduction electrons
impurities
426 Citations (Scopus)

New method for the Anderson model

Barnes, S., 1976, In : Journal of Physics F: Metal Physics. 6, 7, p. 1375-1383 9 p., 018.

Research output: Contribution to journalArticle

diagrams
Impurities
magnetic permeability
impurities
propagation

On the asymmetry in the Kondo susceptibility

Barnes, S., 1976, In : Journal of Physics F: Metal Physics. 6, 6, 005.

Research output: Contribution to journalArticle

asymmetry
magnetic permeability
12 Citations (Scopus)

The Kondo effect in the dynamics of localized moments in metals

Barnes, S., 1976, In : Journal of Physics F: Metal Physics. 6, 9, p. 1713-1722 10 p., 016.

Research output: Contribution to journalArticle

Kondo effect
Paramagnetic resonance
Metals
Impurities
Ions
1974
56 Citations (Scopus)

Fine-structure splitting of a localized moment in a metal: A diagrammatic analysis

Barnes, S., 1974, In : Physical Review B. 9, 11, p. 4789-4807 19 p.

Research output: Contribution to journalArticle

Metals
fine structure
moments
Hamiltonians
Fermions
23 Citations (Scopus)

The effect that finite lattice spacing has upon the ESR Bloch equations

Barnes, S., 1974, In : Journal of Physics F: Metal Physics. 4, 9, p. 1535-1551 17 p., 024.

Research output: Contribution to journalArticle

Paramagnetic resonance
spacing
Electrons
conduction electrons
moments
1973
41 Citations (Scopus)

Diagrammatic analysis of the dynamics of localized moments in metals

Barnes, S. & Zitkova-Wilcox, J., 1973, In : Physical Review B. 7, 5, p. 2163-2192 30 p.

Research output: Contribution to journalArticle

conduction electrons
Metals
moments
Electrons
metals
1972
8 Citations (Scopus)

Generalization of the drone fermion method

Barnes, S., 1972, In : Journal of Physics C: Solid State Physics. 5, 14, 002.

Research output: Contribution to journalArticle

Fermions
fermions
Decomposition
addition theorem
half spaces
1971
4 Citations (Scopus)

Erratum: Hyperfine splitting in a metal of a localized moment (Journal of Applied Physics (1971) 42 (1659))

Barnes, S., Dupraz, J. & Orbach, R., 1971, In : Journal of Applied Physics. 42, 13, p. 5908 1 p.

Research output: Contribution to journalArticle

moments
physics
metals
21 Citations (Scopus)

Hyperfine splitting in a metal of a localized moment

Barnes, S., Dupraz, J. & Orbach, R., 1971, In : Journal of Applied Physics. 42, 4, p. 1659-1665 7 p.

Research output: Contribution to journalArticle

moments
metals
nuclear spin
rare earth alloys
magnetic permeability