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Pressure dependence of magnetic states in Laves Phase RCo2 (R = Dy, Ho, and Er) compounds probed by XMCD

S Watanabe1, N Ishimatsu1, H Maruyama1, J Chaboy2, M A Laguna-Marco2, R Boada2 and N Kawamura3

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In order to probe pressure-induced modification in Co magnetic state in Laves phase RCo2 (R = Dy, Ho, and Er) compounds, we have measured X-ray magnetic circular dichroism (XMCD) under high pressure. The R L2-edge XMCD indicates that Co magnetic moment MCo gradually decreases as the pressure increases. The Co K-edge XMCD shows that the effect of R molecular field is significantly suppressed under high pressure. As a result, it is revealed that the pressure variation of MCo is closely associated with R-Co interaction. The Co magnetic state is separately discussed from that of R partner.


PACS

78.20.Ls Magnetooptical effects

75.30.Kz Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)

75.30.Cr Saturation moments and magnetic susceptibilities

78.70.Dm X-ray absorption spectra

62.50.-p High-pressure effects in solids and liquids

Subjects

Condensed matter: electrical, magnetic and optical

Condensed matter: structural, mechanical & thermal

Dates

Issue 1 (2009)



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