NDLI: A spin resonance investigation of magnetism and dynamics in the charge-transfer salts β″-(BEDT-TTF)$_{4}$[(H$_{3}$O)M(C$_{2}$O$_{4}$)$

Content Provider	Springer Nature Link
Author	Narduzzo, Alessandro Coldea, Amalia Ardavan, Arzhang Singleton, John Pardi, Luca Bercu, Vasile Akutsu Sato, Akane Akutsu, Hiroki Turner, Scott Day, Peter
Copyright Year	2006
Abstract	We report a spin resonance study of the family of quasi-two-dimensional organic (super) conductors β″-(BEDT-TTF)$_{4}$[(H$_{3}$O)M(C$_{2}$O$_{4}$)$_{3}$]S, where M is a 3d transition metal ion and S is a host solvent molecule. The spin systems for M=Cr$^{3+}$ (S=3/2) and M=Fe$^{3+}$ (S=5/2) are investigated by means of both resonant and field modulation techniques in the frequency range between 50 and 313 GHz. The role of the different solvent molecules in determining the degree of spin-orbit coupling and the local symmetry at the metal ion site is established. The low temperature behaviour of intensities, positions and widths of the resonant lines shows significant modifications of the spin-orbit coupling, and of the inter- and intra-ionic spin-spin interactions. Despite the onset of a weak antiferromagnetic internal field at low temperature, the ultimate narrowing of the lines suggests spin-lattice interactions may still be the dominant relaxation process. Diamagnetic screening in the mixed state of the superconducting samples for fields parallel to the quasitwo-dimensional layers induces additional lineshifts only below B=2.5 T and T=4 K, determining the threshold of full field penetration within the anion layers.
Starting Page	581
Ending Page	584
Page Count	4
File Format	PDF
ISSN	00222291
Journal	Journal of Low Temperature Physics
Volume Number	142
Issue Number	3-4
e-ISSN	15737357
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Saturation moments and magnetic susceptibilities Exchange and superexchange interactions Electron paramagnetic resonance and relaxation Characterization and Evaluation of Materials Condensed Matter Magnetism, Magnetic Materials
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Materials Science

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