Research/Sitter/MAGNDATA / 0.77_Tb2Ti2O7.mcif

Tb₂Ti₂O₇

MAGNDATA entry 0.77 · source

noncoplanar ferrimagnet

Opposite moments of different size leave a net magnetisation.

Structure · 10 properties

Magnetic group	R 3m′ BNS 166.101
Point group	3m′
Parent space group	F d 3m No. 227
Spins	noncoplanar · net moment 32.563 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 10.1332 · b 10.1332 · c 10.1332 Å · α 90° · β 90° · γ 90°
Measured at	0.3 K
Magnetic ions	Tb
Largest moment component	3.2 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 R 3m′ →

Atom sites · 7 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Tb1_1	Tb	0.5	0.5	0.5	3.2	3.2	3.2	5.5426
Tb1_2	Tb	0.25	0.75	0	1.9	1.9	−2.3	3.5369
Ti1_1	Ti	0	0	0
Ti1_2	Ti	0.75	0.25	0.5
O1_1	O	0.3285	0.125	0.125
O1_2	O	0.4215	0.125	0.625
O2	O	0.375	0.375	0.375

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

A.P. Sazonov et al. PHYSICAL REVIEW B (2013) · doi:10.1103/PhysRevB.88.184428

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.77_Tb2Ti2O7.mcif from MAGNDATA · entry page

sha256 of this copy: 4e45b31338be3bdcc64befc5c2c0532d27e9b324e039dbe378ff780fa52a89db
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.77_Tb2Ti2O7.mcif.