Research/Sitter/MAGNDATA / 0.242_Tm2Cu2O5.mcif

Tm₂Cu₂O₅

MAGNDATA entry 0.242 · source

noncollinear ferrimagnet

Opposite moments of different size leave a net magnetisation.

ordered ≤ 17 K (−256 °C)Colour: where that sits relative to 25 °C. Saturation: how much margin it has.

Structure · 10 properties

Magnetic group	P n′ a′ 2₁ BNS 33.148
Parent space group	P n a 2₁ No. 33
Spins	coplanar · net moment 24 μ_B per cell
Propagation	[0 0 0] 1k
Cell	a 10.7353 · b 3.4575 · c 12.3704 Å · α 90° · β 90° · γ 90°
Transition	17 K (−256 °C)
Measured at	1.5 K
Magnetic ions	Cu, Tm
Largest moment component	3 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′ a′ 2₁ →

Atom sites · 9 sites · CSV

site	element	x	y	z	m_a	m_b	m_c	\|m\| (μ_B)
Tm1	Tm	0.208	0.234	0	2.6	0	−3	3.9699
Tm2	Tm	0.04	0.225	0.3308	2.6	0	−3	3.9699
Cu1	Cu	0.9892	0.65	0.114	−0.9	0	0	0.9
Cu2	Cu	0.2598	0.672	0.216	−0.9	0	0	0.9
O1	O	0.173	0.724	0.358
O2	O	0.323	0.722	0.065
O3	O	0.127	0.304	0.167
O4	O	0.428	0.776	0.262
O5	O	0.424	0.228	0.477

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.L. Garcia-Muoz et al. Phys. Rev. B (1991) · doi:10.1103/PhysRevB.44.4716

Cite the original paper and MAGNDATA, not this mirror.

Original file

⬇ 0.242_Tm2Cu2O5.mcif from MAGNDATA · entry page

sha256 of this copy: 06d281f3cadf123ba7496d27696bfae93afb04498666fdbf6780f7390715ee6d
The mirror keeps the bytes Bilbao served, so the original should hash the same unless MAGNDATA has revised the entry since: shasum -a 256 0.242_Tm2Cu2O5.mcif.