scholarly journals Free-Energy Shift of Conduction Electrons Due to the s-d Exchange Interaction

1968 ◽  
Vol 40 (4) ◽  
pp. 683-694 ◽  
Author(s):  
J. Kondo
Keyword(s):  
Free Energy ◽  
Exchange Interaction ◽  
Energy Shift ◽  
Conduction Electrons

Free-Energy Shift of Conduction Electrons Due to thes−dExchange Interaction

1966 ◽  
Vol 144 (2) ◽  
pp. 375-381 ◽  
Author(s):  
Kei Yosida ◽  
Hirosi Miwa
Keyword(s):  
Free Energy ◽  
Energy Shift ◽  
Conduction Electrons

scholarly journals Free Energy Shift of Condition Electrons Due to thes-dExchange Interaction

1969 ◽  
Vol 41 (6) ◽  
pp. 1416-1425 ◽  
Author(s):  
Kei Yosida ◽  
Hirosi Miwa
Keyword(s):  
Free Energy ◽  
Energy Shift

Absence of Exchange Interaction Between Localized Magnetic Moments and Conduction-Electrons in Magnetic Ions Diluted in Ag-Nanoparticles

2011 ◽  
Vol 11 (3) ◽  
pp. 2126-2131 ◽  
Author(s):  
J. M. Vargas ◽  
W. Iwamoto ◽  
L. M. Holanda ◽  
S. B. Oseroff ◽  
P. G. Pagliuso ◽  
...  
Keyword(s):  
Exchange Interaction ◽  
Ag Nanoparticles ◽  
Magnetic Moments ◽  
Conduction Electrons ◽  
Magnetic Ions

Absence of exchange interaction between localized magnetic moments and conduction-electrons in diluted Er3+ gold-nanoparticles

2014 ◽  
Vol 115 (17) ◽  
pp. 17E128
Author(s):  
G. G. Lesseux ◽  
W. Iwamoto ◽  
A. F. García-Flores ◽  
R. R. Urbano ◽  
C. Rettori
Keyword(s):  
Gold Nanoparticles ◽  
Exchange Interaction ◽  
Magnetic Moments ◽  
Conduction Electrons

Note on the anisotropy of the correlation function for impurity angular momentum and the conduction electrons spins in alloys with cerium impurities

1970 ◽  
Vol 48 (24) ◽  
pp. 2912-2916
Author(s):  
A. D. Singh Nagi
Keyword(s):  
Correlation Function ◽  
Angular Momentum ◽  
Exchange Interaction ◽  
Second Order ◽  
Anisotropic Behavior ◽  
Conduction Electrons ◽  
Diagrammatic Method

Using a diagrammatic method and employing the exchange interaction Hamiltonian given by Coqblin and Schrieffer, the correlation function for the impurity angular momentum and the conduction electrons spins for alloys with cerium impurities is computed up to second order in J. The correlation function shows a strong anisotropic behavior.

Phase Diagrams of Ni2MnX (X = In, Sn, Sb) Heusler Alloys with Inversion of Exchange Interaction

2008 ◽  
Vol 583 ◽  
pp. 131-146 ◽  
Author(s):  
Vasiliy D. Buchelnikov ◽  
Sergey Taskaev ◽  
M.A. Zagrebin ◽  
Peter Entel
Keyword(s):  
Free Energy ◽  
Phase Transitions ◽  
Exchange Interaction ◽  
Phase Diagrams ◽  
Magnetic Phase ◽  
Landau Theory ◽  
Heusler Alloys ◽  
Magnetic Phase Transitions ◽  
Experimental Phase ◽  
Ginzburg Landau

In this work with the help of the phenomenological Ginzburg-Landau theory of structural and magnetic phase transitions the phase diagrams of Heusler Ni-Mn-X (X = In, Sn, Sb) alloys with the inversion of exchange interaction are investigated. The investigation shows that the type of the phase diagrams in Heusler Ni-Mn-X (X = In, Sn, Sb) alloys depends on the value and sign of the free energy parameters. As it is seen from the analysis of the phase diagrams with the determined values and signs of the parameters of Landau functional there are thermodynamic paths which allow to explain experimental phase transitions in Heusler alloys Ni-Mn-X (X = In, Sn, Sb) and Ni-Co- Mn-X (X = In, Sn, Sb) qualitatively.

Magnetic and electrical properties of ferromagnetic alloys near the critical concentration

1968 ◽  
Vol 306 (1486) ◽  
pp. 355-368 ◽  
Keyword(s):  
Field Theory ◽  
Free Energy ◽  
Low Temperatures ◽  
Landau Theory ◽  
Critical Concentration ◽  
Ferromagnetic Alloy ◽  
Conduction Electrons ◽  
Ferromagnetic Alloys ◽  
Similar Dependence ◽  
Temperature Resistivity

A simple molecular field theory is developed to explain at least qualitatively the behaviour of weakly ferromagnetic and strongly paramagnetic alloys near their critical concentration c F . The free energy of a weakly ferromagnetic alloy can be expanded in powers of magnetization ζ and a modified Landau theory is used to calculate the concentration dependence of the magnetization, specific heat and the susceptibility near c F . It is believed that such a theory can work better in this case than does the usual Landau theory as fluctuations in ζ are relatively small for low temperatures. A change in low temperature resistivity around c F is also expected as a result of ciritcal scattering of conduction electrons. This change was first calculated by Rice (1967) for strongly paramagnetic alloys giving a large T 2 term. However, this calculation is not applicable for c very close to c F . It is shown that for c → c F the paramagnetic resistivity remains finite and has a maximum for c ═ c F , ρ Para c ═ c F ∝ T 5/3 . It is also found that the ferromagnetic resistivity ρ ferro has a similar dependence on concentration and temperature as ρ Para and ρ ferro c ═ c F ═ ρ Para c ═ c F , i.e. the resisitivity is symmetrical around c F .

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