Research/Sitter/MAGNDATA / 1.583_La1.5Ca0.5CoO4.mcif

La_1.5Ca_0.5CoO₄

MAGNDATA entry 1.583 · source

antiferromagnet

No net magnetisation, and up and down sublattices are related by a shift or by inversion, so the bands stay spin-degenerate: a conventional antiferromagnet.

Spin group ¹m¹m¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 52 K (−221 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P_c c BNS 7.28
Parent space group	C m m 2 No. 35
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 0 1/2] 1k
Cell	a 10.832 · b 5.402 · c 24.626 Å · α 90° · β 90° · γ 90°
Transition	52 K (−221 °C)
Measured at	2 K
Magnetic ions	Co
Largest moment component	2.35 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_c c →

Atom sites · 32 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Co1_1	Co	0	0	0
Co1_2	Co	0	0.5	0.25
Co2_1	Co	0.2515	0.5	0	2.35	0	0.13	2.3536
Co2_2	Co	0.2515	0	0.25	2.35	0	0.13	2.3536
O1_1	O	0.121	0.2494	0
O1_2	O	0.121	0.7494	0.25
O2_1	O	0.3755	0.7542	0
O2_2	O	0.3755	0.2542	0.25
O3_1	O	0	0	0.0834
O3_2	O	0	0	0.9166
O3_3	O	0	0.5	0.3334
O3_4	O	0	0.5	0.1666
O4_1	O	0.2495	0	0.3369
O4_2	O	0.2495	0	0.6631
O4_3	O	0.2495	0.5	0.5869
O4_4	O	0.2495	0.5	0.9131
La1_1	La	0.0015	0	0.1807
La1_2	La	0.0015	0	0.8193
La1_3	La	0.0015	0.5	0.4307
La1_4	La	0.0015	0.5	0.0693
Ca1_1	Ca	0.0015	0	0.1807
Ca1_2	Ca	0.0015	0	0.8193
Ca1_3	Ca	0.0015	0.5	0.4307
Ca1_4	Ca	0.0015	0.5	0.0693
La2_1	La	0.2515	0	0.4311
La2_2	La	0.2515	0	0.5689
La2_3	La	0.2515	0.5	0.6811
La2_4	La	0.2515	0.5	0.8189
Ca2_1	Ca	0.2515	0	0.4311
Ca2_2	Ca	0.2515	0	0.5689
Ca2_3	Ca	0.2515	0.5	0.6811
Ca2_4	Ca	0.2515	0.5	0.8189

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

G. Subias et al. PHYSICAL REVIEW B (2021) · doi:10.1103/PhysRevB.103.184422

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.583_La1.5Ca0.5CoO4.mcif from MAGNDATA · entry page

sha256 of this copy: 57a43cc58ce7b0ae6d6445b3a7055b31e5032ded201800037e3a6f3fdc65995c
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.583_La1.5Ca0.5CoO4.mcif.