Conduction-electron paramagnetic resonance in metals

Khabibullin, B. M.; Kharakhash'yan, É. G.

doi:10.1070/pu1974v016n06abeh004091

Cited by 7 publications

(5 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The increase in intensity of the g ¼ 2.001 signal aer annealing in hydrogen can be explained by the growing concentration of carbon vacancies at which unpaired electron density is localized. According to the calculations made by Khabibullin et al, 29 hydrogen adsorption on TiC is preferable on carbon atoms of the (001) and (111) planes. At elevated temperatures, formation of CH x fragments takes place.…”

Section: Tic Powder Aer Thermal Treatment In Hydrogenmentioning

confidence: 99%

Structural transformation and nature of defects in titanium carbide treated in different redox atmospheres

et al. 2020

View full text Add to dashboard Cite

show abstract

Section: Tic Powder Aer Thermal Treatment In Hydrogenmentioning

confidence: 99%

Structural transformation and nature of defects in titanium carbide treated in different redox atmospheres

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Conduction electron spin resonance (CESR) is very important to understand the spin relaxation of the electrons in metals. This allowed to study the temperature dependent spin relaxation of conduction electrons via the line width and gave the first insights into the time scales of spin relaxation 100 , 101 , 102 . It motivated the theoretical work.…”

Section: Theoretical Perspectivesmentioning

confidence: 99%

“…This allowed to study the temperature dependent spin relaxation of conduction electrons via the line width and gave the first insights into the time scales of spin relaxation. [95][96][97] It motivated the theoretical work. Later, the Kambersk y model 98 was developed for energy relaxation of the ferromagnetic resonance (FMR).…”

Section: Theoretical Perspectivesmentioning

confidence: 99%

Perspective: Ultrafast magnetism and THz spintronics

Walowski

Münzenberg

2016

Journal of Applied Physics

315

205

View full text Add to dashboard Cite

This year the discovery of femtosecond demagnetization by laser pulses is 20 years old. For the first time, this milestone work by Bigot and coworkers gave insight directly into the time scales of microscopic interactions that connect the spin and electron system. While intense discussions in the field were fueled by the complexity of the processes in the past, it now became evident that it is a puzzle of many different parts. Rather than providing an overview that has been presented in previous reviews on ultrafast processes in ferromagnets, this perspective will show that with our current depth of knowledge the first applications are developed: THz spintronics and all-optical spin manipulation are becoming more and more feasible. The aim of this perspective is to point out where we can connect the different puzzle pieces of understanding gathered over 20 years to develop novel applications. Based on many observations in a large number of experiments. Differences in the theoretical models arise from the localized and delocalized nature of ferromagnetism. Transport effects are intrinsically non-local in spintronic devices and at interfaces. We review the need for multiscale modeling to address the processes starting from electronic excitation of the spin system on the picometer length scale and sub-femtosecond time scale, to spin wave generation, and towards the modeling of ultrafast phase transitions that altogether determine the response time of the ferromagnetic system. Today, our current understanding gives rise to the first usage of ultrafast spin physics for ultrafast magnetism control: THz spintronic devices. This makes the field of ultrafast spin-dynamics an emerging topic open for many researchers right now. Published by AIP Publishing. [http://dx

show abstract

“…where D is the coefficient of diffusion. The use of the values m F = 9.7 9 10 5 m/s as for bulk regular graphite p band (Kelly 1981), K = 10 nm and d = 59 lm (293 K), 91 lm (4.2 K) leads, according to Eq. 3, to the diffusion time T D = 5.4 9 10 -7 s for T = 293 K and 12.9 9 10 -7 s for 4.2 K. We consider that the reason for the T D increase with temperature lowering is related to the growing skin depth d due to the increase in the resistivity (q = 3 9 10 -4 Xm for T = 293 K and 6.5 9 10 -4 Xm for 4.2 K; our unpublished results).…”

Section: Structure Peculiarity Of Shungite From Shunga Depositmentioning

confidence: 99%

EPR and magnetism of the nanostructured natural carbonaceous material shungite

et al. 2009

View full text Add to dashboard Cite

The X-band EPR and magnetic susceptibility in the temperature range 4.2-300 K study of the shungite-I, natural nanostructured material from the deposit of Shunga are reported. Obtained results allow us to assign the EPR signal to conduction electrons, estimate their number, N P , and evaluate the Pauli paramagnetism contribution to shungite susceptibility. A small occupation (*5%) of the localized nonbonding p states in the zigzag edges of the open-ended graphene-like layers and/or on r (sp 2?x) orbitals in the curved parts of the shungite globules has been also revealed. The observed temperature dependence of the EPR linewidth can be explained by the earlier considered interaction of conduction p electrons with local phonon modes associated with the vibration of peripheral carbon atoms of the open zigzag-type edges and with peripheral carbon atoms cross-linking different nanostructures. The relaxation time T 2 and diffusion time T D are found to have comparable values (2.84 9 10-8 and 1.73 9 10-8 s at 5.2 K, respectively), and similar dependence on temperature. The magnetic measurements have revealed the suppression of orbital diamagnetism due to small amount of large enough fragments of the graphene layers.

show abstract

Conduction-electron paramagnetic resonance in metals

Cited by 7 publications

References 3 publications

Structural transformation and nature of defects in titanium carbide treated in different redox atmospheres

Structural transformation and nature of defects in titanium carbide treated in different redox atmospheres

Perspective: Ultrafast magnetism and THz spintronics

EPR and magnetism of the nanostructured natural carbonaceous material shungite

Contact Info

Product

Resources

About