Theory of charge and spin ordering in the nickelates - Physics ...

Bulk transitions
Transitions are all first order, w/ hysteresis
GARCÍA-MUÑOZ et al.
Resistance (ohms)
Nd
10 8
10 7
10 6
10 5
10 4
10 3
10 2
10 9 0 50 100 150 200 250 300
Magnetization (x 10 5 , emu/g)
3.0
2.6
2.2
180 190 200 210 220 230 240
T(K)
TABLE I. a Refin
in space group Pbnm.
50 K in space group P
Atom
a a=5.38712
Nd 4c 0.9958
Ni 4b 1/2
O1 4c 0.0692
O2 8d 0.7165
x
Torrance et al, 1992
10 1
T (K)
FIG. 1. Color online Resistance of NdNiO 3 on heating and
cooling showing an augment of 3 orders of magnitude after formation
of a charge Garcia-Munoz order phase. Inset: kink inet theal, susceptibility 2009 related
with the metal-insulator transition and the onset of the antiferromagnetic
order T N =T MI . Hysteresis on heating and cooling can be
appreciated.
Polycrystalline NdNiO 3 was synthesized under high oxygen
pressure 200 bar following the procedure described in
Ref. 28. The sample was extensively characterized by laboratory
x-ray powder diffraction, magnetic and electric measurements,
and synchrotron diffraction, which confirmed its
quality. High-resolution synchrotron x-ray powder-
290 K 2
Pbnm 4.53
Atom
b a=5.37783
Nd 4c 0.99321
Ni1 2d 1/2
Ni2 2c 1/2
O1 4e 0.07521
O2a 4e 0.71432
x