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Title: Magnetoelectric behavior via a spin state transition

Journal Article · · Nature Communications

In magnetoelectric materials, magnetic and dielectric/ferroelectric properties couple to each other. This coupling could allow lower power consumption and new functionalities in devices such as sensors, memories and transducers, since voltages instead of electric currents are sensing and controlling the magnetic state. We investigate a different method to magnetoelectric coupling in which we use the magnetic spin state instead of the more traditional ferro or antiferromagnetic order to couple to electric properties. In our molecular compound, magnetic field induces a spin crossover from the S=1 to the S=2 state of Mn3+, which in turn generates molecular distortions and electric dipoles. These dipoles couple to the magnetic easy axis, and form different polar, antipolar and paraelectric phases vs magnetic field and temperature. Spin crossover compounds are a large class of materials where the spin state can modify the structure, and here we demonstrate that this is a route to magnetoelectric coupling.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Molecular Magnetic Quantum Materials (M2QM); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Univ. of Florida, Gainesville, FL (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
Grant/Contract Number:
89233218CNA000001; SC0019330
OSTI ID:
1619655
Alternate ID(s):
OSTI ID: 1565851; OSTI ID: 1601772
Report Number(s):
LA-UR-17-29041; 4043; PII: 11967
Journal Information:
Nature Communications, Journal Name: Nature Communications Vol. 10 Journal Issue: 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United Kingdom
Language:
English
Citation Metrics:
Cited by: 20 works
Citation information provided by
Web of Science

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