Research/Sitter/MAGNDATA / 0.679_TbCr0.5Mn0.5O3.mcif

TbCr_0.5Mn_0.5O₃

MAGNDATA entry 0.679 · 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 ≤ 84 K (−189 °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 62.448
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 5.301 · b 5.605 · c 7.505 Å · α 90° · β 90° · γ 90°
Transition	84 K (−189 °C)
Measured at	3.4 K
Magnetic ions	Cr, Mn, Tb
Largest moment component	0.77 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)
Tb1	Tb	0.483	0.43	0.75
O1	O	0.6	0.031	0.75
O2	O	0.7	0.308	0.049
Mn1	Mn	0.5	0	0	0.77	0	0	0.77
Cr1	Cr	0.5	0	0	0.77	0	0	0.77

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

M. Staruch et al. Journal of Applied Physics (2014) · doi:10.1063/1.4890637

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.679_TbCr0.5Mn0.5O3.mcif from MAGNDATA · entry page

sha256 of this copy: e1ee960982fb17640f78cb325166d79725b789a4e78b2eccf62edbf76db6c1c1
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.679_TbCr0.5Mn0.5O3.mcif.