Research/Sitter/MAGNDATA / 0.153_Bi2RuMnO7.mcif

Bi₂RuMnO₇

MAGNDATA entry 0.153 · source

d-wave altermagnet

No net magnetisation, yet the electron bands are spin-split: the up and down spin sublattices are related only by a rotation or mirror, never by a shift or inversion. d-wave: the splitting changes sign twice around the Fermi surface (2 nodal planes).

Spin group ²4/¹m¹m²m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 20 K (−253 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	F d′ d′ d BNS 70.530
Point group	m′m′m
Parent space group	F d 3m No. 227
Spins	collinear · 2 nodal planes · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 10.2081 · b 10.2081 · c 10.2081 Å · α 90° · β 90° · γ 90°
Transition	20 K (−253 °C)
Measured at	2 K
Magnetic ions	Mn
Largest moment component	1.78 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 F d′ d′ d →

Atom sites · 9 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Bi1	Bi	0	0	0
Mn1	Mn	0	0	0	1.78	0	0	1.78
Ru1	Ru	0.5	0.5	0.5
Mn2	Mn	0.5	0.5	0.5
Bi2	Bi	0.5	0.5	0.5
O1_1_1	O	0.826	0.125	0.125
O1_1_2	O	0.125	0.826	0.125
O1_1_3	O	0.125	0.125	0.826
O2	O	0.125	0.125	0.125

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

R. Martinez-Coronado et al. Journal of Power Sources (2014) · doi:10.1016/j.jpowsour.2013.08.125

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.153_Bi2RuMnO7.mcif from MAGNDATA · entry page

sha256 of this copy: 3c9d22c34acd4d67464efb2f7f9b1d197317250ef18992b9f173d41ce5f96966
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.153_Bi2RuMnO7.mcif.