X-Ray Detected Magnetic Resonance: A Unique Probe of the Precession Dynamics of Orbital Magnetization Components

International Journal of Molecular Sciences

Joᖾ Goulon¹  Andrei Rogalev¹  Gérard Goujon¹  Fabrice Wilhelm¹  Jamal Ben Youssef²  Claude Gros³  Jean-Michel Barbe³ 

[1] European Synchrotron Radiation Facility, B.P. 220, F-38043 Grenoble Cedex, France;Laboratoire de Magńetisme de Bretagne, CNRS FRE 2697, UFR Sciences et Techniques, F-29328 Brest Cedex, France;Institut de Chimie Moĺeculaire de l’Université de Bourgogne, UMR CNRS 5260, Groupe LIMRES, 9 Avenue Alain Savary, BP 47870, F-21078 Dijon Cedex, France

关键词: XDMR;    XMCD;    FMR;    high field EPR;    AFMR;   

DOI  :  10.3390/ijms12128797

来源: mdpi

【 摘 要 】

X-ray Detected Magnetic Resonance (XDMR) is a novel spectroscopy in which X-ray Magnetic Circular Dichroism (XMCD) is used to probe the resonant precession of local magnetization components in a strong microwave pump field. We review the conceptual bases of XDMR and recast them in the general framework of the linear and nonlinear theories of ferromagnetic resonance (FMR). Emphasis is laid on the information content of XDMR spectra which offer a unique opportunity to disentangle the precession dynamics of spin and orbital magnetization components at given absorbing sites. For the sake of illustration, we focus on selected examples in which marked differences were found between FMR and XDMR spectra simultaneously recorded on ferrimagnetically ordered iron garnets. With pumping capabilities extended up to sub-THz frequencies, high-field XDMR should allow us to probe the precession of orbital magnetization components in paramagnetic organometallic complexes with large zero-field splitting. Even more challenging, we suggest that XDMR spectra might be recorded on selected antiferromagnetic crystals for which orbital magnetism is most often ignored in the absence of any supporting experimental evidence.

【 授权许可】

CC BY   
© 2011 by the authors; licensee MDPI, Basel, Switzerland.