Detection of induced paramagnetic moments in Pt on Y${}_3$Fe${}_5$O${}_{12}$ via x-ray magnetic circular dichroism

Abstract

Magnetic moments in an ultra-thin Pt film on a ferrimagnetic insulator Y${}_3$Fe${}_5$O${}_{12}$ (YIG) have been investigated at high magnetic fields and low temperatures by means of X-ray magnetic circular dichroism (XMCD). We observed an XMCD signal due to the magnetic moments in a Pt film at the Pt $L_3$- and $L_2$-edges. By means of the element-specific magnetometry, we found that the XMCD signal at the Pt $L_3$-edge gradually increases with increasing the magnetic field even when the field is much greater than the saturation field of YIG. Importantly, the observed XMCD intensity was found to be much greater than the intensity expected from the Pauli paramagnetism of Pt when the Pt film is attached to YIG. These results imply the emergence of induced paramagnetic moments in Pt on YIG and explain the characteristics of the unconventional Hall effect in Pt/YIG systems.

8 pages, 5 figures

References in corpus (10)

• Spin Seebeck insulator
• Theory of spin Hall magnetoresistance
• Longitudinal Spin Seebeck Effect Free from the Proximity Nernst Effect
• Electrical detection of spin pumping due to the precessing magnetization of a single ferromagnet
• Electronic control of the spin-wave damping in a magnetic insulator
• Investigation of induced Pt magnetic polarization in Pt/Y3Fe5O12 bilayers
• Quantitative Temperature Dependence of Longitudinal Spin Seebeck Effect at High Temperatures
• Anomalous Hall effect in YIG$|$Pt bilayers
• Anomalous Nernst and Hall effects in magnetized platinum and palladium
• Interface-dependent magnetotransport properties for thin Pt films on ferrimagnetic Y3Fe5O12

Cited by in corpus (6)

• Spin and spin current -- From fundamentals to recent progress
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• Composition-tunable magnon-polaron anomalies in spin Seebeck effects in epitaxial Bi${}_x$Y${}_{3-x}$Fe${}_5$O${}_{12}$ films
• Static magnetic proximity effects and spin Hall magnetoresistance in Pt/Y${}_3$Fe${}_5$O${}_{12}$ and inverted Y${}_3$Fe${}_5$O${}_{12}$/Pt bilayers
• Cryogenic spin Peltier effect detected by a RuO${}_2$-AlO${}_x$ on-chip microthermometer
• Appearance of ferromagnetism in Pt(100) ultrathin films originated from quantum-well states