Research/Sitter/MAGNDATA / 0.560_Ho0.2Bi0.8FeO3.mcif

Ho_0.2Bi_0.8FeO₃

MAGNDATA entry 0.560 · 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.

Structure · 9 properties

Magnetic group	P n′ m a′ BNS 62.448
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 5.5436 · b 7.805 · c 5.4042 Å · α 90° · β 90° · γ 90°
Measured at	6 K
Magnetic ions	Fe
Largest moment component	4.7 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 · 5 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Bi1	Bi	−0.006	0.25	−0.038
Ho1	Ho	−0.006	0.25	−0.038
Fe1	Fe	0	0	0.5	0	0	4.7	4.7
O1	O	0.628	0.25	0.069
O2	O	0.2949	0.0292	−0.2983

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

J. Singh et al. AIP Advances (2019) · doi:10.1063/1.5082386

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.560_Ho0.2Bi0.8FeO3.mcif from MAGNDATA · entry page

sha256 of this copy: 91241c87a52ba2baa626b83156c2e6a05dd8c60d48b49cb0bb70835958bc495d
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.560_Ho0.2Bi0.8FeO3.mcif.