TY - JOUR

T1 - Temperature dynamics of magnetoactive compounds under terahertz irradiation: characterization by an EPR study

AU - Tumanov, S. V.

AU - Melnikov, A. R.

AU - Artiukhova, N. A.

AU - Bogomyakov, A. S.

AU - Shevchenko, O. A.

AU - Getmanov, Ya V.

AU - Ovcharenko, V. I.

AU - Fedin, M. V.

AU - Veber, S. L.

N1 - Funding Information: This work was financially supported by the Russian Foundation for Basic Research (Project No. 20-33-90190). Publisher Copyright: © 2022, Springer Science+Business Media LLC.

PY - 2022/7

Y1 - 2022/7

N2 - A possibility of fast rapid temperature changing for the studied compound makes it possible to study related phenomena, such as thermally induced trapping of metastable states in magnetoactive compounds and thermally activated catalytic and biological processes. The Electron Paramagnetic Resonance (EPR) spectroscopy station at the Novosibirsk Free Electron Laser (NovoFEL) allows one to study effects of powerful terahertz (THz) radiation on the spin state of paramagnetic systems. A change in the sample temperature as a result of radiation absorption is an inevitable consequence of such an exposure. However, the sample heating at the NovoFEL EPR station itself is of interest due to the record power of THz radiation and small sizes of the samples used. A combination of these two factors can provide a significantly high heating rate. The magnetoactive complex [Cu(hfac)2LEt] was chosen as a model system for studying the heating process, since the complex has a magnetostructural transition at ∼125 K with substantially different spin states above and below the transition temperature. The heating processes with the amplitudes above 60 K were studied, the heating and cooling rates of the sample in similar experiments were estimated, and prospects for using the method to study various thermally induced effects are discussed.

AB - A possibility of fast rapid temperature changing for the studied compound makes it possible to study related phenomena, such as thermally induced trapping of metastable states in magnetoactive compounds and thermally activated catalytic and biological processes. The Electron Paramagnetic Resonance (EPR) spectroscopy station at the Novosibirsk Free Electron Laser (NovoFEL) allows one to study effects of powerful terahertz (THz) radiation on the spin state of paramagnetic systems. A change in the sample temperature as a result of radiation absorption is an inevitable consequence of such an exposure. However, the sample heating at the NovoFEL EPR station itself is of interest due to the record power of THz radiation and small sizes of the samples used. A combination of these two factors can provide a significantly high heating rate. The magnetoactive complex [Cu(hfac)2LEt] was chosen as a model system for studying the heating process, since the complex has a magnetostructural transition at ∼125 K with substantially different spin states above and below the transition temperature. The heating processes with the amplitudes above 60 K were studied, the heating and cooling rates of the sample in similar experiments were estimated, and prospects for using the method to study various thermally induced effects are discussed.

KW - EPR spectroscopy

KW - magnetoactive compound

KW - magnetostructural transition

KW - pulsed heating

KW - terahertz radiation

UR - http://www.scopus.com/inward/record.url?scp=85135613224&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/e38c3886-6308-3497-822a-5ead1faa782a/

U2 - 10.1007/s11172-022-3543-x

DO - 10.1007/s11172-022-3543-x

M3 - Article

AN - SCOPUS:85135613224

VL - 71

SP - 1378

EP - 1384

JO - Russian Chemical Bulletin

JF - Russian Chemical Bulletin

SN - 1066-5285

IS - 7

ER -