Anti-Kondo effect in Rh-Fe: de Haas-van Alphen observations of scattering anisotropy and exchange energy

1979 ◽  
Vol 19 (7) ◽  
pp. 3722-3742 ◽  
Author(s):  
L. S. Cheng ◽  
R. J. Higgins ◽  
J. E. Graebner ◽  
J. J. Rubin
Keyword(s):  
Kondo Effect ◽  
Exchange Energy ◽  
Scattering Anisotropy

The Effect of Alloying on the Fermi Surface of Copper. II. Electron-scattering and Neck Cross Sections with Dilute Heterovalent and Transition Metal Solutes

1971 ◽  
Vol 49 (19) ◽  
pp. 2449-2461 ◽  
Author(s):  
P. T. Coleridge ◽  
I. M. Templeton
Keyword(s):  
Transition Metal ◽  
Fermi Surface ◽  
Electron Scattering ◽  
Cross Sections ◽  
Kondo Effect ◽  
Metal Alloys ◽  
Neck Size ◽  
Transition Metal Alloys ◽  
Scattering Anisotropy ◽  
Scattering Cross Sections

The Fermi surface neck size and the scattering cross sections for the neck and [Formula: see text] belly orbits have been measured in dilute alloys of Zn, Al, Ge, Si, Ni, Co, Fe, Mn, and Cr in Cu. Earlier observations of rigid-band behavior for the neck size in Cu(Zn) and Cu(Al), while essentially substantiated by the present measurements, are now believed to be fortuitous; Cu(Ge) and Cu(Si) do not agree with a rigid-band prediction. The changes (generally reductions) of neck size in the transition metal alloys do not appear to be related directly to changes of electron concentration. The scattering anisotropy is rather small in the heterovalent alloys, the scattering being somewhat greater on the necks, but is large and in the opposite sense in the transition metal alloys. The magnitude and anisotropy of scattering is interpreted in terms of phase shifts associated with the impurities and the wave functions over the Fermi surface. There is evidence for additional scattering anisotropy in alloys exhibiting the Kondo effect.

Calculation of exchange energy in quantum dots : application to porous silicon

1993 ◽  
Vol 03 (C5) ◽  
pp. 355-358 ◽  
Author(s):  
G. FISHMAN ◽  
R. ROMESTAIN ◽  
J. C. VIAL
Keyword(s):  
Quantum Dots ◽  
Porous Silicon ◽  
Exchange Energy

KONDO EFFECT AND LOCALIZED SPIN FLUCTUATIONS IN THE Zn-TRANSITION METAL SYSTEM

1971 ◽  
Vol 32 (C1) ◽  
pp. C1-221-C1-223
Author(s):  
P. J. FORD ◽  
C. RIZZUTO ◽  
E. SALAMONI ◽  
P. ZANI
Keyword(s):  
Transition Metal ◽  
Kondo Effect ◽  
Spin Fluctuations ◽  
Metal System ◽  
Transition Metal System

MÖSSBAUER RELAXATION MEASUREMENTS ON Yb IN LaBel3 : INFLUENCE OF KONDO EFFECT AND SUPERCONDUCTIVITY

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-729-C8-730 ◽  
Author(s):  
P. Bonville ◽  
P. Imbert ◽  
G. Jéhanno ◽  
F. Gonzalez-Jimenez
Keyword(s):  
Kondo Effect ◽  
Relaxation Measurements

POTENTIAL PRODUCTIVITY ADAPTIVE AGROPHUTOCENOZIS ON SLOPING LANDS OF THE STEPPE TRANS-URALS

2020 ◽  
Author(s):  
R.А. Idrisov ◽  
Keyword(s):  
Protein C ◽  
Nutritional Value ◽  
Energy Content ◽  
Single Species ◽  
Exchange Energy ◽  
Metabolic Energy ◽  
Potential Productivity ◽  
Maximum Productivity ◽  
Sloping Lands ◽  
Natural Herb

The correct construction of agrophytocenoses on the slopes of the steppe trans-Urals helped to create maximum productivity. In the arid climate, the most productive were the double mixtures of alfalfa with brittle sitnik, wheatgrass is syd, providing an average of 41.6 and 40.2 quintals per hectare (c/ha) of hay, 32.1 and 31.0 GJ/ha OE (exchange energy per hectare), 4.5 and 4.3 quintals per hectare of boiled protein (c/ha) over 5 years. Single-species steppe ecotypes, brittle sieve and wheatgrass sieve in productivity slightly gave way to double components, providing respectively hay- 32.2 and 37.2 cents per hectare, exchange energy 22.2 and 25.7 GJ/ha, digested protein 1.93 and 2.53 c/ha. The enrichment of agrophytocense by the legume component allowed to increase the metabolic energy content to the level of 32.1 and 31.0-GJ/ha, digested protein to 4.5 and 4.3 quintals per hectare, which is 14 times the nutritional value of the metabolic energy, the digested protein is 10 times higher than the natural herb.

scholarly journals Renormalization of spin excitations and Kondo effect in open-shell nanographenes

2021 ◽  
Vol 104 (7) ◽  
Author(s):  
David Jacob ◽  
Ricardo Ortiz ◽  
Joaquín Fernández-Rossier
Keyword(s):  
Kondo Effect ◽  
Open Shell ◽  
Spin Excitations

Weak Kondo effect in the monocrystalline transition metal dichalcogenide ZrTe2

2021 ◽  
Vol 103 (17) ◽  
Author(s):  
Yihao Wang ◽  
Changzheng Xie ◽  
Junbo Li ◽  
Zan Du ◽  
Liang Cao ◽  
...  
Keyword(s):  
Transition Metal ◽  
Kondo Effect ◽  
Transition Metal Dichalcogenide

scholarly journals Intrinsically weak magnetic anisotropy of cerium in potential hard-magnetic intermetallics

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Anna Galler ◽  
Semih Ener ◽  
Fernando Maccari ◽  
Imants Dirba ◽  
Konstantin P. Skokov ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Magnetic Anisotropy ◽  
High Performance ◽  
Kondo Effect ◽  
Quantitative Description ◽  
Many Body ◽  
Heavy Rare Earth Elements ◽  
Fe Intermetallics ◽  
Full Temperature

AbstractCerium-based intermetallics are currently attracting much interest as a possible alternative to existing high-performance magnets containing scarce heavy rare-earth elements. However, the intrinsic magnetic properties of Ce in these systems are poorly understood due to the difficulty of a quantitative description of the Kondo effect, a many-body phenomenon where conduction electrons screen out the Ce-4f moment. Here, we show that the Ce-4f shell in Ce–Fe intermetallics is partially Kondo screened. The Kondo scale is dramatically enhanced by nitrogen interstitials suppressing the Ce-4f contribution to the magnetic anisotropy, in striking contrast to the effect of nitrogenation in isostructural intermetallics containing other rare-earth elements. We determine the full temperature dependence of the Ce-4f single-ion anisotropy and show that even unscreened Ce-4f moments contribute little to the room-temperature intrinsic magnetic hardness. Our study thus establishes fundamental constraints on the potential of cerium-based permanent magnet intermetallics.

Sign in / Sign up

Export Citation Format

Share Document