Research/Sitter/MAGNDATA / 0.138_BiCrO3.mcif

BiCrO₃

MAGNDATA entry 0.138 · source

s-wave compensated ferrimagnet

Opposite moments cancel, but the two sublattices aren't related by any symmetry, so the bands split like a ferromagnet's (s-wave).

Spin group ¹2/¹m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 114 K (−159 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	C 2/c BNS 15.85
Point group	2/m
Parent space group	C 2/c No. 15
Spins	collinear · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 9.454 · b 5.4752 · c 9.5771 Å · α 90° · β 108.55° · γ 90°
Transition	114 K (−159 °C)
Measured at	90 K
Magnetic ions	Cr
Largest moment component	2.04 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 C 2/c →

Atom sites · 6 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Bi1	Bi	0.1331	0.2166	0.1313
Cr1	Cr	0.25	0.25	0.5	0	−2.04	0	2.04
Cr2	Cr	0	0.763	0.25	0	2.04	0	2.04
O1	O	0.086	0.204	0.5869
O2	O	0.1552	0.523	0.3643
O3	O	0.3582	0.526	0.159

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

C. Darie et al. Solid State Sciences (2010) · doi:10.1016/j.solidstatesciences.2008.12.004

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.138_BiCrO3.mcif from MAGNDATA · entry page

sha256 of this copy: 91cd11634c4849b72ea851f693009d7773561f1eaab26b73d4fb37f12b6a4e45
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.138_BiCrO3.mcif.