Research/Sitter/MAGNDATA / 0.592_DyCrO3.mcif

DyCrO₃

MAGNDATA entry 0.592 · 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 ≤ 146 K (−127 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P n′ m′ a BNS 62.446
Parent space group	P b n m No. 62
Spins	collinear · 2 nodal planes · net moment 0 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 5.266 · b 5.22 · c 7.547 Å · α 90° · β 90° · γ 90°
Transition	146 K (−127 °C)
Measured at	4.2 K
Magnetic ions	Cr, Dy
Largest moment component	2.6 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)
Cr1	Cr	0.5	0	0	0	0	2.6	2.6
Dy1	Dy	0.484	0.433	0.75
O1	O	0.603	0.034	0.75
O2	O	0.694	0.297	0.053

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

B. Van Laar et al. J. Physique (1971) · doi:10.1051/jphys:01971003204030100

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.592_DyCrO3.mcif from MAGNDATA · entry page

sha256 of this copy: e23419415aecea11828a4e26131ef4f1cff1e2dde6f7368a5ffc1f489de3a1de
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.592_DyCrO3.mcif.