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періодичних видань НАН України
Pressure effect on electronic structure and magnetic properties of MB₆ and MB₁₂ borides
Репозиторій DSpace/Manakin
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Pressure effect on electronic structure and magnetic properties of MB₆ and MB₁₂ borides
Інший ID:
PACS: 62.20.Dc, 71.15.Nc, 71.20.Lp
Посилання:
Pressure effect on electronic structure and magnetic properties of MB₆ and MB₁₂ borides / G.E. Grechnev, A.E. Baranovskiy, A.V. Logosha, A.S. Panfilov, V.D. Fil, T.V. Ignatova, N.Yu. Shitsevalova, O. Eriksson // Физика и техника высоких давлений. — 2006. — Т. 16, № 4. — С. 110-114. — Бібліогр.: 13 назв. — англ.
Підтримка:
This work has been supported by the Swedish Research Council (VR) and the Foundation for Strategic Research (SSF), and by INTAS project 03-51-3036.
Дата:
2006
Переглядів:
930
Завантажень:
584
Анотація:
Theoretical and experimental studies of the pressure effect on electronic structure and magnetic properties of MB₆ and MB₁₂ borides are carried out to determine the electronic ground states and interactions responsible for the bulk and magnetic properties of these compounds. The band structure and total energy E were calculated ab initio for a number of atomic volumes, providing the equation of states, E(V), bulk moduli B, magnetic moments and susceptibilities. The temperature and pressure dependencies of magnetic susceptibility were also experimentally studied for a number of borides using a pendulum-type magnetometer. In semimetallic EuB₆ the paramagnetic Curie temperature is found to be increasing with pressure, dθ/dP = 0.44 ± 0.03 K/kbar, whereas in closely related GdB₆ compound the pressure effect is lower in magnitude but opposite in sign: dθ/dP = –0.17 ± 0.03 K/kbar. The peculiar details in electronic structures are found to be responsible for distinctions in magnetic ordering and the pressure effects on indirect f−f interactions.
