Research/Sitter/MAGNDATA / 2.69_La0.5Ca0.5MnO3.mcif

La_0.5Ca_0.5MnO₃

MAGNDATA entry 2.69 · source

noncollinear antiferromagnet

All moments add up to a net magnetisation: an ordinary magnet. Spin splitting is the same in every direction (s-wave).

ordered ≤ 155 K (−118 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P_a 2₁/m BNS 11.55
Parent space group	P n m a No. 62
Spins	coplanar · net moment 0 μ_B per cell
Propagation	[0 0 1/2] · [1/2 0 1/2] 2k
Cell	a 10.8932 · b 7.5247 · c 10.9526 Å · α 90° · β 90° · γ 90°
Transition	155 K (−118 °C)
Measured at	1.5 K
Magnetic ions	Mn
Largest moment component	2.8 μ_B
Method	NPD

Symmetry

Stereogram of the magnetic point group: each operation applied to one direction. Filled = upper hemisphere, ring = lower; red operations include time reversal. Lines are mirrors; polygons are 2/3/4/6-fold axes; the centre ring is inversion.

Every structure in P_a 2₁/m →

Atom sites · 19 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
La1_1	La	0.0097	0.25	0.2482
La1_2	La	0.2403	0.75	0.4982
La1_3	La	0.2597	0.25	0.0018
La1_4	La	0.5097	0.25	0.2482
Ca1_1	Ca	0.0097	0.25	0.2482
Ca1_2	Ca	0.2403	0.75	0.4982
Ca1_3	Ca	0.2597	0.25	0.0018
Ca1_4	Ca	0.5097	0.25	0.2482
Mn1_1	Mn	0	0	0	1.01	0	2.8	2.9766
Mn1_2	Mn	0.5	0	0	1.01	0	2.8	2.9766
Mn1_3	Mn	0.25	0	0.25	0	0	2.57	2.57
O1_1	O	0.2452	0.25	0.2823
O1_2	O	0.0047	0.75	0.5323
O1_3	O	0.4953	0.25	0.9677
O1_4	O	0.7452	0.25	0.2823
O2_1	O	0.136	0.0337	0.1135
O2_2	O	0.114	0.9663	0.3635
O2_3	O	0.386	0.4663	0.1364
O2_4	O	0.636	0.0337	0.1135

Moment components are along the crystal axes a, b, c (μ_B), as magCIF writes them. Symmetry generates the rest of the cell from these sites.

Source

P. G. Radaelli et al. PHYSICAL REVIEW B (1997) · doi:10.1103/PhysRevB.55.3015

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 2.69_La0.5Ca0.5MnO3.mcif from MAGNDATA · entry page

sha256 of this copy: 7f930010bb7cc76c834219cc8eacfb4719125478925ae4689eb9272bfa65d4cc
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 2.69_La0.5Ca0.5MnO3.mcif.