# Control of Magnetism via B‑Site Order and Disorder in Y2NiTiO6 Perovskite

## TL;DR

This paper studies how the magnetic properties of Y2NiTiO6 perovskite change with temperature due to structural ordering and disorder.

## Contribution

The study reveals how B-site ordering in Y2NiTiO6 controls its magnetic behavior through a temperature-induced structural transition.

## Key findings

- Y2NiTiO6 undergoes a structural transition at ~1700 K, changing from orthorhombic to monoclinic.
- Magnetic properties shift from spin-glass to antiferromagnetic order with structural ordering.
- Optical properties remain unchanged across the transition.

## Abstract

The first reported phase in the Y2O3–NiO–TiO2 chemical space, the Y2NiTiO6 perovskite
undergoes a temperature-induced order–disorder transition.
Above ∼1700 K, it adopts the structure of a disordered CaTiO3-type orthorhombic perovskite with a = 5.26939(2), b = 5.60367(2), and c = 7.58137(3) Å,
with the B site uniformly occupied by 0.5Ni+0.5Ti.
Below this temperature, Y2NiTiO6 adopts rock-salt
ordering of the transition metals in a monoclinic unit cell (a = 5.26695(2), b = 5.60164(2), c = 7.57493(2) Å, β = 90.4940(2)°) with
0.9/0.1 ordering of the B site. Ordering of Ni and
Ti changes the magnetic properties from spin-glass behavior in the
orthorhombic phase to antiferromagnetic order (T

N
= 17 K) for the monoclinic phase, while
the optical properties of both phases remain unchanged across the
transition.