Magnetic-field-tuned phase transition of a molecular material from the isolated-spin to the coupled-spin regime

Santana, Vinícius T.; Cunha, Beatriz N.; Plutı́n, Ana M.; Silveira, Rafael G.; Castellano, Eduardo E.; Batista, Alzir A.; Calvo, Rafael; Nascimento, Otaciro Rangel

doi:10.1039/c8cp06719h

Cited by 3 publications

(2 citation statements)

References 82 publications

(106 reference statements)

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“…3) Rotator Sample Holder (RSH): is designed to rotate samples such as single crystals or thin films in the magnetic field during the HF-ESR measurements. The information extracted from those measurements can provide detailed information about anisotropy of magnetic interactions in paramagnetic materials or solid-state phenomena as cyclotron resonances in conducting materials [54]- [58].…”

Section: Description Of Sample Holdersmentioning

confidence: 99%

Sample Holders for Sub-THz Electron Spin Resonance Spectroscopy

Sojka

Šedivý

Lagin

et al. 2022

IEEE Trans. Instrum. Meas.

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Electron Spin Resonance (ESR) is a powerful spectroscopic technique used to investigate samples with unpaired electrons in a broad range of scientific fields. High-Frequency ESR (HF-ESR) spectrometers operating at sub-THz frequencies are mostly custom-made with non-standard solutions. This paper presents a set of six different exchangeable sample holders with a fast-loading flange for a sub-THz ESR spectrometer operating at high magnetic fields up to 16 T, and temperature ranges of 4 -400 K. Here, we report on the concept, design, and illustrative measurements of non-resonant ESR sample holders for measurements of samples in a liquid solution, polycrystalline compressed powders, oriented single crystals, electrical devices under sub-THz irradiation, as well as for samples transferred from ultrahigh vacuum (UHV) systems without air contamination. Our solution expands the usage possibilities for HF-ESR spectroscopy, showing that one spectrometer with the presented concept of sample holders enables a wide range of applications.

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Section: Description Of Sample Holdersmentioning

confidence: 99%

Sample Holders for Sub-THz Electron Spin Resonance Spectroscopy

Sojka

Šedivý

Lagin

et al. 2022

IEEE Trans. Instrum. Meas.

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“…Changes in the spectra of weakly coupled monomeric spins as a function of J′ were initially explained using the exchange narrowing theory 36,37 and rigorously proved by classical Anderson-Kubo's general theories of magnetic resonance. 38,39 In later years, experimental and theoretical investigations were done on infinite coupled-spin systems and the understanding of the exchange narrowing process evolved for monomeric spins 40 and for AFM DUs, 23,24,34,41 where the process is thermally activated. The purpose of this work is to study weak interdinuclear couplings through their effects on the EPR spectra.…”

Section: Introductionmentioning

confidence: 99%