Наукова електронна бібліотека
періодичних видань НАН України
періодичних видань НАН України
Pressure effects on electronic structure and magnetic properties of anisotropic metallic compounds
Репозиторій DSpace/Manakin
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Pressure effects on electronic structure and magnetic properties of anisotropic metallic compounds
Інший ID:
PACS: 71.20.–b, 75.10.Lp, 75.20.En, 75.80.+q
Посилання:
Pressure effects on electronic structure and magnetic properties of anisotropic metallic compounds / G.E. Grechnev, A.S. Panfilov, A.V. Fedorchenko, I.V. Svechkarev, V.B. Filippov, A.B. Lyashchenko, A.N. Vasiliev // Физика и техника высоких давлений. — 2008. — Т. 18, № 4. — С. 112-118. — Бібліогр.: 19 назв. — англ.
Підтримка:
This work has been supported by the Russian-Ukrainian RFBR-NASU project 8-2008.
Дата:
2008
Переглядів:
946
Завантажень:
645
Анотація:
Pressure effects on electronic structure and magnetic properties of anisotropic metallic materials (CrB₂, FeGe₂, LaFeAsO) are investigated. Magnetic susceptibilities of CrB₂ and FeGe₂ compounds were studied under hydrostatic pressure at fixed temperatures, 77 and 300 K. In order to analyze the experimental magnetovolume effects, the electronic structures were calculated ab initio in external magnetic field as a function of atomic volume by employing a full-potential LMTO method. The calculated field-induced magnetic moments and their volume derivatives compare favorably with the experimental pressure effects in magnetic properties of CrB₂ and FeGe₂. The main role of pressure in high-Tc superconductivity of LaFeAsO is found to reduce density of states at the Fermi level and to suppress ferromagnetic spin fluctuations.
