Research/Sitter/MAGNDATA / 0.79_CaIrO3.mcif

CaIrO₃

MAGNDATA entry 0.79 · 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 ¹m²m²m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 115 K (−158 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	C m′ c m′ BNS 63.464
Point group	m′m′m
Parent space group	C m c m No. 63
Spins	collinear · 2 nodal planes · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 3.1472 · b 9.8655 · c 7.3018 Å · α 90° · β 90° · γ 90°
Transition	115 K (−158 °C)
Magnetic ions	Ir
Largest moment component	1 μ_B
Method	RXRD

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 m′ c m′ →

Atom sites · 4 sites · CSV

site	element	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Ca1	Ca	0.7492	0.25
Ir1	Ir	0	0	0	0	1	1
O1	O	0.0779	0.25
O2	O	0.3658	0.4452

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

K. Ohgushi et al. PHYSICAL REVIEW LETTERS (2013) · doi:10.1103/PhysRevLett.110.217212

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.79_CaIrO3.mcif from MAGNDATA · entry page

sha256 of this copy: c0f627531892825b7bad985a06365088b64bbafd256b31fc05e0f9b312f4b96c
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.79_CaIrO3.mcif.