Research/Sitter/MAGNDATA / 1.74_BiMn2O5.mcif

BiMn₂O₅

MAGNDATA entry 1.74 · source

p-wave magnet

Coplanar spins, no net moment, and a translation that reverses every spin: spin splitting that is odd in momentum (p-wave).

ordered ≤ 39 K (−234 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	C_a m c 2₁ BNS 36.178
Point group	mm21′
Parent space group	P b a m No. 55
Spins	coplanar · net moment 0 μ_B per cell
Propagation	[1/2 0 1/2] 1k
Cell	a 15.1216 · b 8.533 · c 11.5213 Å · α 90° · β 90° · γ 90°
Transition	39 K (−234 °C)
Measured at	1.6 K
Magnetic ions	Mn
Largest moment component	3.12 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_a m c 2₁ →

Atom sites · 12 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Bi1_1	Bi	0.0799	0.1659	0
Bi1_2	Bi	0.9202	0.8341	0
Mn1	Mn	0	0.5	0.3694	−2.44	0.6	0	2.5127
Mn2_1	Mn	0.2037	0.3516	0.25	3.12	0.8	0	3.2209
Mn2_2	Mn	0.7963	0.6484	0.25	3.12	0.8	0	3.2209
O1	O	0	0	0.1433
O2_1	O	0.0776	0.444	0
O2_2	O	0.9224	0.556	0
O3_1	O	0.072	0.4241	0.25
O3_2	O	0.928	0.5759	0.25
O4_1	O	0.1928	0.1995	0.127
O4_2	O	0.8072	0.8005	0.127

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

A. Munoz et al. PHYSICAL REVIEW B (2002) · doi:10.1103/physrevb.65.144423

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.74_BiMn2O5.mcif from MAGNDATA · entry page

sha256 of this copy: d2d9ab6c4ceb266caed1591ef810b4a76524946a53ed1a6bac5bbb7321438206
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.74_BiMn2O5.mcif.