Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Deprecated: Implicit conversion from float 231.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534
Warning: imagejpeg(C:\Inetpub\vhosts\kidney.de\httpdocs\phplern\28660878
.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Nat+Commun
2017 ; 8
(ä): 15929
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Jahn-Teller distortion driven magnetic polarons in magnetite
#MMPMID28660878
Huang HY
; Chen ZY
; Wang RP
; de Groot FMF
; Wu WB
; Okamoto J
; Chainani A
; Singh A
; Li ZY
; Zhou JS
; Jeng HT
; Guo GY
; Park JG
; Tjeng LH
; Chen CT
; Huang DJ
Nat Commun
2017[Jun]; 8
(ä): 15929
PMID28660878
show ga
The first known magnetic mineral, magnetite, has unusual properties, which have
fascinated mankind for centuries; it undergoes the Verwey transition around 120?K
with an abrupt change in structure and electrical conductivity. The mechanism of
the Verwey transition, however, remains contentious. Here we use resonant
inelastic X-ray scattering over a wide temperature range across the Verwey
transition to identify and separate out the magnetic excitations derived from
nominal Fe(2+) and Fe(3+) states. Comparison of the experimental results with
crystal-field multiplet calculations shows that the spin-orbital dd excitons of
the Fe(2+) sites arise from a tetragonal Jahn-Teller active polaronic distortion
of the Fe(2+)O(6) octahedra. These low-energy excitations, which get weakened for
temperatures above 350?K but persist at least up to 550?K, are distinct from
optical excitations and are best explained as magnetic polarons.