Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2008

Идентификатор DOI: 10.1103/PhysRevLett.100.045508

Ключевые слова: Emission spectroscopy, Magnetoelectronics, Pressure effects, Synchrotron radiation, Diamond anvil cell, Magnetic transition, X-ray magnetic circular dichroism, Magnetite

Аннотация: Fe K-edge x-ray magnetic circular dichroism of magnetite (Fe(3)O(4)) powders was measured with synchrotron radiation under variable pressure and temperature conditions in diamond anvil cell. The magnetic dichroism was observed to decrease discontinuously by similar to 50% between 12 and 16 GPa, independent of temperature. The magnetic transition is attributed to a high-spin to intermediate-spin transition of Fe(2+) ions in the octahedral sites and could account for previously observed structural and electrical anomalies in magnetite at this pressure range. The interpretation of x-ray magnetic circular dichroism data is supported by x-ray emission spectroscopy and theoretical cluster calculations.

Журнал: PHYSICAL REVIEW LETTERS

Выпуск журнала: Vol. 100, Is. 4

ISSN журнала: 00319007

Место издания: COLLEGE PK

Издатель: AMER PHYSICAL SOC

• Ding Y. (HPSynC,Carnegie Institution of Washington)
• Mao H.-K. (HPCAT,Carnegie Institution of Washington,Building 434E)
• Haskel D. (Advanced Photon Source,Argonne National Laboratory)
• Tseng Y.-C. (Advanced Photon Source,Argonne National Laboratory)
• Lang J.C. (Advanced Photon Source,Argonne National Laboratory)
• Ovchinnikov S.G. (Siberian Federal University)
• Orlov Y.S. (Siberian Federal University)

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