English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

4 páginas, 4 figuras.-- PACS number(s): 75.50.Xx, 75.45.+j, 76.30.Kg, 75.40.Gb.-- et al.We investigate the mechanism of spin-lattice relaxation of Er ions encapsulated in polyoxometalate clusters, which below 4 K can only reverse its spin via quantum tunneling processes. The temperature-independent rate τ−1 is, at zero field, ten orders of magnitude larger than the rates predicted for direct phonon-induced processes. In addition, we observe that τ−1 is suppressed by external magnetic bias and hyperfine interactions but enhanced by increasing the concentration of Er ions. The observed relaxation agrees with predictions for pure quantum tunneling, showing that this phenomenon drives the thermalization of electronic spins. A possible link between these two phenomena is discussed, involving the collective emission of phonons from particular spin configurations attained via quantum tunneling.The\udpresent work has been partly funded by grant MOLSpinQIP\udfrom the EU, grants Molecular Nanoscience (Consolider Ingenio\ud2010 Program), MOLCHIP, M3EM and NANOMOL\udfrom the Spanish MICINN, grant NABISUP from DGA, and\udthe PROMETEO Program from the Generalidad Valenciana.Peer reviewe

physical review b

Spin-lattice relaxation via quantum tunneling in an<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mtext>Er</mml:mtext></mml:mrow><mml:mrow><mml:mn>3</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>-polyoxometalate molecular magnet

Spin-lattice relaxation via quantum tunneling in anEr3+-polyoxometalate molecular magnet