The atmospheric pressure form of CsNiF3 consists of hcp layers of CsF3 with F6 octahedra face‐shared to form infinite chains along the c axis. CsNiF3 transforms at ∼5 kbars to a 9‐layer stacking sequence with ⅔ of the layers hcp and ⅓ of the layers ccp while at ∼50 kbars it transforms to a 6‐layer stacking sequence with ⅓ of the layers hcp and ⅔ of the layers ccp. Once formed, these phases are stable at atmospheric pressure to several hundred degrees C. The 9‐layer phase is paramagnetic above 80°K with μeff=3.2 μB and Θp=−75°K. Trace amounts of a ferromagnetic material prevented further analysis below 80°K. The light‐yellow 6‐layer phase shows a ferrimagnetic Tc=111°K and a dTc/dp=0.53°K/kbar. The magnetic and optical properties are very similar to the isostructural RbNiF3.
[1]
J. Goodenough,et al.
Pressure‐Effect Measurements Using a Vibrating‐Coil Magnetometer
,
1969
.
[2]
J. Longo,et al.
Pressure-induced structural changes in the system Ba1−xSrxRuO3
,
1968
.
[3]
J. Longo,et al.
Effect of pressure on the structure and magnetic properties of RbNiF3
,
1968
.
[4]
J. Goodenough.
Localized versus collective d electrons and Néel temperatures in perovskite and perovskite-pelated structures
,
1967
.
[5]
T. Mcguire,et al.
MAGNETIC AND OPTICAL PROPERTIES OF TRANSPARENT RbNiF3
,
1967
.
[6]
R. Fukuda,et al.
A New Ferrimagnetic Compound TlNiF3
,
1967
.