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@ARTICLE{Trautner:619357,
author = {Trautner, Viktoria and Rijal, A. and Plueckthun, C. and
Satta, N. and Koemets, E. and Buchen, J. and Wang, B. and
Glazyrin, K. and Cobden, L. and Marquardt, H.},
title = {{I}ron {C}ontent‐{D}ependence of {F}erropericlase
{E}lastic {P}roperties {A}cross the {S}pin {C}rossover
{F}rom {N}ovel {E}xperiments and {M}achine {L}earning},
journal = {Geophysical research letters},
volume = {51},
number = {22},
issn = {0094-8276},
address = {Hoboken, NJ},
publisher = {Wiley},
reportid = {PUBDB-2024-07576},
pages = {e2024GL111276},
year = {2024},
abstract = {The iron spin crossover in (Mg$_{1-x}$Fe$_x$)O
ferropericlase causes changes to its physical properties
that are expected to affect seismic velocities in Earth's
lower mantle. We present new time-resolved pressure-volume
measurements of iron-rich ferropericlase (x$_{Fe}$ = 0.40,
0.59) and combine the results with literature data with
x$_{Fe}$ = 0.04–0.6 to investigate the dependence of
ferropericlase elastic properties on iron content. We infer
the relationship between unit-cell volume, pressure and iron
content directly from the data by training Mixture Density
Networks and derive bulk modulus, density and bulk sound
velocity from the outputs. This allows us to constrain the
effect of the spin crossover on these properties and
estimate their uncertainties for different iron contents.
Our findings indicate that the spin crossover may
significantly alter the physical properties of
ferropericlase in iron-enriched regions in the lowermost
mantle, with implications for the interpretation of seismic
heterogeneities observed near the core-mantle boundary.},
cin = {DOOR ; HAS-User / FS-PET-D / FS-PET-S},
ddc = {550},
cid = {I:(DE-H253)HAS-User-20120731 / I:(DE-H253)FS-PET-D-20190712
/ I:(DE-H253)FS-PET-S-20190712},
pnm = {631 - Matter – Dynamics, Mechanisms and Control
(POF4-631) / 6G3 - PETRA III (DESY) (POF4-6G3) / DEEP-MAPS -
Deep Earth Mantle Phase Transition Maps: Studied by
Time-Resolved Experiments (864877)},
pid = {G:(DE-HGF)POF4-631 / G:(DE-HGF)POF4-6G3 /
G:(EU-Grant)864877},
experiment = {EXP:(DE-H253)P-P02.2-20150101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:001368886500001},
doi = {10.1029/2024GL111276},
url = {https://bib-pubdb1.desy.de/record/619357},
}