Research/Sitter/MAGNDATA / 1.522_CrVO4.mcif

CrVO₄

MAGNDATA entry 1.522 · 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 ≤ 50 K (−223 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P 1 BNS 2.4
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 5.568 · b 8.208 · c 5.977 Å · α 90° · β 90° · γ 90°
Transition	50 K (−223 °C)
Measured at	4.2 K
Magnetic ions	Cr
Largest moment component	1.87 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 1 →

Atom sites · 7 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Cr1_1	Cr	0	0	0	1.87	0.92	0.33	2.11
Cr1_2	Cr	0	0	0.5	−1.87	−0.92	−0.33	2.11
V1	V	0	0.355	0.25
O1_1	O	0	0.241	0.026
O1_2	O	0	0.759	0.526
O2_1	O	0.251	0.475	0.25
O2_2	O	0.749	0.475	0.25

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. C. Frazer et al. Physical Review (1963) · doi:10.1103/PhysRev.125.1283

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 1.522_CrVO4.mcif from MAGNDATA · entry page

sha256 of this copy: 290169b80b5de00027839a707fa7fb167c8ae521160e8de0ea2269b755493c2e
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 1.522_CrVO4.mcif.