Research/Sitter/MAGNDATA / 0.379_SmFeO3.mcif

SmFeO₃

MAGNDATA entry 0.379 · 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 ≤ 480 K (207 °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 5.3983 · b 5.5987 · c 7.7071 Å · α 90° · β 90° · γ 90°
Transition	480 K (207 °C)
Measured at	300 K
Magnetic ions	Fe
Largest moment component	3.692 μ_B
Method	NSD

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)
Sm1	Sm	0.4866	0.4432	0.75
Fe1	Fe	0	0.5	0	0	0	3.692	3.692
O1	O	0.5948	0.0289	0.75
O2	O	0.6995	0.2991	0.0497

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

C.-Y. Kuo et al. Phys. Rev. Lett. (2014) · doi:10.1103/PhysRevLett.113.217203

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.379_SmFeO3.mcif from MAGNDATA · entry page

sha256 of this copy: 2320c37acbcfe858da3744efa551f477f9e4b121a76acb53490aa6ce722f2b38
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.379_SmFeO3.mcif.