We present a practical setup to perform continuous-wave X-band electron paramagnetic resonance spectroscopy by using planar microstrip lines and general purpose instrumentation. We fabricated Ag/alumina and Nb/sapphire microstrip resonators and transmission lines and compared their performance down to 2 K and under applied magnetic field. We used these devices to study single crystals of molecular Cr3 nanomagnets. By means of X-band planar resonators we measured angle-dependent spectra at fixed frequency, while broadband transmission lines were used to measure continuous wave spectra with varying frequency in the range 2–25 GHz. The spectra acquired at low temperatures allowed to extract the essential parameters of the low-lying energy levels of Cr3 and demonstrate that this method is particularly suitable to study small crystals of molecular nanomagnets.

Microstrip Resonators and Broadband Lines for X-band EPR Spectroscopy of Molecular Nanomagnets / Ghirri, Alberto; Bonizzoni, Claudio; Righi, Mattia; Fedele, Federico; Timco, Grigore; Winpenny, Richard; Affronte, Marco. - In: APPLIED MAGNETIC RESONANCE. - ISSN 0937-9347. - 46:(2015), pp. 749-756. [10.1007/s00723-015-0672-5]

Microstrip Resonators and Broadband Lines for X-band EPR Spectroscopy of Molecular Nanomagnets

GHIRRI, Alberto;BONIZZONI, CLAUDIO;RIGHI, Mattia;FEDELE, FEDERICO;AFFRONTE, Marco
2015

Abstract

We present a practical setup to perform continuous-wave X-band electron paramagnetic resonance spectroscopy by using planar microstrip lines and general purpose instrumentation. We fabricated Ag/alumina and Nb/sapphire microstrip resonators and transmission lines and compared their performance down to 2 K and under applied magnetic field. We used these devices to study single crystals of molecular Cr3 nanomagnets. By means of X-band planar resonators we measured angle-dependent spectra at fixed frequency, while broadband transmission lines were used to measure continuous wave spectra with varying frequency in the range 2–25 GHz. The spectra acquired at low temperatures allowed to extract the essential parameters of the low-lying energy levels of Cr3 and demonstrate that this method is particularly suitable to study small crystals of molecular nanomagnets.
2015
46
749
756
Microstrip Resonators and Broadband Lines for X-band EPR Spectroscopy of Molecular Nanomagnets / Ghirri, Alberto; Bonizzoni, Claudio; Righi, Mattia; Fedele, Federico; Timco, Grigore; Winpenny, Richard; Affronte, Marco. - In: APPLIED MAGNETIC RESONANCE. - ISSN 0937-9347. - 46:(2015), pp. 749-756. [10.1007/s00723-015-0672-5]
Ghirri, Alberto; Bonizzoni, Claudio; Righi, Mattia; Fedele, Federico; Timco, Grigore; Winpenny, Richard; Affronte, Marco
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1074847
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