Research/Sitter/MAGNDATA / 0.309_TlCrO3.mcif

TlCrO₃

MAGNDATA entry 0.309 · 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 ²m¹m²m: each symmetry marked ¹ keeps every spin, ² swaps up and down.

ordered ≤ 89 K (−184 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 11 properties

Magnetic group	P n m a BNS 62.441
Point group	mmm
Parent space group	P n m a No. 62
Spins	collinear · 2 nodal planes · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 5.39539 · b 7.6402 · c 5.29163 Å · α 90° · β 90° · γ 90°
Transition	89 K (−184 °C)
Measured at	1.5 K
Magnetic ions	Cr
Largest moment component	2.46 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 n m a →

Atom sites · 4 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Tl1	Tl	0.0466	0.25	−0.0146
Cr1	Cr	0	0	0.5	0	2.46	0	2.46
O1	O	0.4506	0.25	0.1094
O2	O	0.2999	0.0577	0.6962

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

L. Ding et al. PHYSICAL REVIEW B (2017) · doi:10.1103/PhysRevB.95.054432

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.309_TlCrO3.mcif from MAGNDATA · entry page

sha256 of this copy: 0dc863f853f6596b05f91d64d75b14836b4c378121402ece2f7330378a5f64e4
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.309_TlCrO3.mcif.