Temat: 71.15.La - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Electronic Structure and Transport Properties of UFe$\text{}_{2}$ System
Autorzy:: Szlaferek, A.
Szajek, A.
Baszyński, J.
Smardz, L.
Kowalczyk, A.
Timko, M.
Powiązania:: https://bibliotekanauki.pl/articles/2013662.pdf
Data publikacji:: 2000-05
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.15.La
71.20.Lp
72.15.Eb
Opis:: The electronic structure of the UFe$\text{}_{2}$ compound was studied by X-ray photoemission spectroscopy and ab initio self-consistent tight binding muffin tin orbital method. This compound crystallizes in a cubic Laves phase. The calculated valence band spectrum is characterized by two peaks due to U(5f) and Fe(3d) states. We have found a good agreement between the experimental valence band spectrum and theoretical ab initio calculations. The carrier concentration estimated from the Hall effect amounts to ≈10$\text{}^{22}$ cm$\text{}^{-3}$.
Źródło:: Acta Physica Polonica A; 2000, 97, 5; 815-818
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: Influence of the Local Environment on the Magnetic Properties of the Ordered Fe$\text{}_{1-x}$Al$\text{}_{x}$ Alloy
Autorzy:: Deniszczyk, J.
Powiązania:: https://bibliotekanauki.pl/articles/2013232.pdf
Data publikacji:: 2000-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.15.La
71.15.Fv
71.20.Lp
75.50.Bb
75.30.-m
Opis:: The electronic and magnetic properties of the ordered binary Fe$\text{}_{1-x}$Al$\text{}_{x}$ alloy with the B2 crystal structure were calculated for Al concentrations x=0.1875-0.5 using the supercell structure. The calculations showed that for increasing Al contents the average magnetization of Fe$\text{}_{1-x}$Al$\text{}_{x}$ falls down rapidly. Upon lowering the unit cell volume, almost all configurations of compositions with x ≥ 0.25 show the abrupt change of magnetic state from the high moment magnetic state to the low moment magnetic state with the moment reduction 0.6-0.8 μ$\text{}_{B}$ per atom. The configurations were found for which the low moment magnetic state solutions with the antiferromagnetic alignment of magnetic moments of Fe atoms at antisite positions are stable.
Źródło:: Acta Physica Polonica A; 2000, 97, 3; 583-586
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

Tytuł:: Effect of the Order on the Structural and Magnetic Properties of Fe-X (X=Al, Si) Alloys with B2 Structure
Autorzy:: Deniszczyk, J.
Powiązania:: https://bibliotekanauki.pl/articles/2014406.pdf
Data publikacji:: 2000-11
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.20.Lp
71.15.La
75.50.Bb
75.30.-m
71.15.Fv
Opis:: Previous ab initio super-cell calculations of the magnetic properties of the ordered Fe$\text{}_{1-x}$Al$\text{}_{x}$ alloy in the B2 structure are extended to include the disordered state of the alloy and completed with the calculations for ordered and disordered Fe$\text{}_{1-x}$Si$\text{}_{x}$ alloys. The configurations of the Fe atoms in the anti-site (AS) positions of Fe-X super-cell with the antiferromagnetic order were found. The ground state of Fe$\text{}_{1-x}$Al$\text{}_{x}$ with x≃ 0.3 shows the antiferromagnetic order of the Fe-AS magnetic moments. The concentration dependence of the equilibrium lattice parameter and magnetic moment of Fe$\text{}_{1-x}$X$\text{}_{x}$ in the ordered and disordered state differ qualitatively.
Źródło:: Acta Physica Polonica A; 2000, 98, 5; 543-546
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 4.

Tytuł:: Influence of Local Environment on the Electronic Structure and Magnetic Properties of Ni$\text{}_{1-x}$Cu$\text{}_{x}$MnSb Alloys
Autorzy:: Jezierski, A.
Szytuła, A.
Powiązania:: https://bibliotekanauki.pl/articles/2013241.pdf
Data publikacji:: 2000-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 31.15.Ar
31.15.Ew
71.15.Mb
71.15.-m
71.15.La
71.20.-b
71.20.Be
Opis:: The magnetic ordering in Ni$\text{}_{1-x}$Cu$\text{}_{x}$MnSb alloys changes from ferromagnetic (x=0) to antiferromagnetic (x=1). The X-ray and neutron diffraction showed that the systems crystallise in C1$\text{}_{b}$ type structure. We present an influence of the local chemical ordering on the electronic and magnetic properties of Ni$\text{}_{1-x}$Cu$\text{}_{x}$MnSb alloys. The band structure and the magnetic moments were calculated by the spin-polarised linear muffin-tin orbital in the atomic sphere approximation method for the experimental values of the lattice parameters. The magnetic moment of Mn increases from 3.8 μ$\text{}_{B}$ for x=0 to 4.18 μ$\text{}_{B}$ for x=1.
Źródło:: Acta Physica Polonica A; 2000, 97, 3; 607-610
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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