Magnetic Field Perturbations to a Soft X-ray-Activated Fe (II) Molecular Spin State Transition

Guanhua Hao; Alpha T. N’Diaye; Thilini K. Ekanayaka; Ashley S. Dale; Xuanyuan Jiang; Esha Mishra; Corbyn Mellinger; Saeed Yazdani; John W. Freeland; Jian Zhang; Ruihua Cheng; Xiaoshan Xu; Peter A. Dowben

doi:10.3390/magnetochemistry7100135

Magnetochemistry (Oct 2021)

Magnetic Field Perturbations to a Soft X-ray-Activated Fe (II) Molecular Spin State Transition

Guanhua Hao,
Alpha T. N’Diaye,
Thilini K. Ekanayaka,
Ashley S. Dale,
Xuanyuan Jiang,
Esha Mishra,
Corbyn Mellinger,
Saeed Yazdani,
John W. Freeland,
Jian Zhang,
Ruihua Cheng,
Xiaoshan Xu,
Peter A. Dowben

Affiliations

Guanhua Hao: Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
Alpha T. N’Diaye: Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
Thilini K. Ekanayaka: Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
Ashley S. Dale: Physics Department, Indiana University Purdue University-Indianapolis, Indianapolis, IN 46202, USA
Xuanyuan Jiang: Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
Esha Mishra: Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
Corbyn Mellinger: Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
Saeed Yazdani: Physics Department, Indiana University Purdue University-Indianapolis, Indianapolis, IN 46202, USA
John W. Freeland: Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439, USA
Jian Zhang: Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
Ruihua Cheng: Physics Department, Indiana University Purdue University-Indianapolis, Indianapolis, IN 46202, USA
Xiaoshan Xu: Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588, USA
Peter A. Dowben: Department of Physics and Astronomy, University of Nebraska-Lincoln, Lincoln, NE 68588, USA

DOI: https://doi.org/10.3390/magnetochemistry7100135
Journal volume & issue: Vol. 7, no. 10
p. 135

Abstract

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The X-ray-induced spin crossover transition of an Fe (II) molecular thin film in the presence and absence of a magnetic field has been investigated. The thermal activation energy barrier in the soft X-ray activation of the spin crossover transition for [Fe{H2B(pz)2}2(bipy)] molecular thin films is reduced in the presence of an applied magnetic field, as measured through X-ray absorption spectroscopy at various temperatures. The influence of a 1.8 T magnetic field is sufficient to cause deviations from the expected exponential spin state transition behavior which is measured in the field free case. We find that orbital moment diminishes with increasing temperature, relative to the spin moment in the vicinity of room temperature.

Published in Magnetochemistry

ISSN: 2312-7481 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry
Website: http://www.mdpi.com/journal/magnetochemistry

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