Research/Sitter/MAGNDATA / 1.478_CoTi2O5.mcif

CoTi₂O₅

MAGNDATA entry 1.478 · 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 ¹2/¹m × ²1: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 26 K (−247 °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	C m c m No. 63
Spins	collinear · net moment 0 μ_B per cell
Propagation	[1/2 1/2 0] 1k
Cell	a 7.453 · b 19.401 · c 10.0731 Å · α 90° · β 90° · γ 90°
Transition	26 K (−247 °C)
Measured at	1.5 K
Magnetic ions	Co
Largest moment component	2.72 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 · 5 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Co1	Co	0.0955	0.25	0	0	2.72	2.72
O1	O	0.3926	0.25
O2	O	0.0231	0.1129
O3	O	0.1575	0.0596
Ti1	Ti	0.0668	0.5677

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

F.K.K. Kirschner et al. PHYSICAL REVIEW B (2019) · doi:10.1103/PhysRevB.99.064403

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.478_CoTi2O5.mcif from MAGNDATA · entry page

sha256 of this copy: 169d431e73401b9692f4af81546d6420217257cfa61c8020e9273bcf49f2a0ae
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.478_CoTi2O5.mcif.