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1992•Journal of Magnetism and Magnetic MaterialsOpen access

Magnetic moments in a gadolinium iron garnet studied by soft-X-ray magnetic circular dichroism

Petra Rudolf, F. Sette, Liu Hao Tjeng, G. Meigs, C.T. Chen

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Abstract

The magnetic moments of Gd and Fe in gadolinium (Gd 3 Fe 5 O 12 ) were probed at 77 and 300 K by soft-X-ray magnetic circular dichroism (SXMCD) measurements at the GdM 4.5 and the FeL 2.3 absorption edges. The SXMCD signal at each edge allows one to independently determine the magnetic ordering for each specific ion, and the temperature dependence confirms that the reversal of the macroscopic magnetization is due to the reversal of each local magnetic moment of the Fe and the Gd atoms when the compensation point ( T comp = 288 K ) is crossed. This work therefore demonstrates that SXMCD can probe element and site specific magnetic properties of multi-component systems.

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What this paper is about

The magnetic moments of Gd and Fe in gadolinium (Gd 3 Fe 5 O 12 ) were probed at 77 and 300 K by soft-X-ray magnetic circular dichroism (SXMCD) measurements at the GdM 4.5 and the FeL 2.3 absorption edges. The SXMCD signal at each edge allows one to independently determine the magnetic ordering for each specific ion, and the temperature dependence confirms that the reversal of the macroscopic magnetization is due to the reversal of each local magnetic moment of the Fe and the Gd atoms when the compensation point ( T comp = 288 K ) is crossed. This work therefore demonstrates that SXMCD can probe element and site specific magnetic properties of multi-component systems.

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Available abstract

The magnetic moments of Gd and Fe in gadolinium (Gd 3 Fe 5 O 12 ) were probed at 77 and 300 K by soft-X-ray magnetic circular dichroism (SXMCD) measurements at the GdM 4.5 and the FeL 2.3 absorption edges. The SXMCD signal at each edge allows one to independently determine the magnetic ordering for each specific ion, and the temperature dependence confirms that the reversal of the macroscopic magnetization is due to the reversal of each local magnetic moment of the Fe and the Gd atoms when the compensation point ( T comp = 288 K ) is crossed. This work therefore demonstrates that SXMCD can probe element and site specific magnetic properties of multi-component systems.

Key concepts: Magnetic circular dichroism, X-ray magnetic circular dichroism, Magnetic moment, Gadolinium, Materials science, Magnetization, Condensed matter physics, Nuclear magnetic resonance

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