Linear spin wave theory provides the leading term in the calculation of the excitation spectra
of long-range ordered magnetic systems as a function of $1/\sqrt {S} $. This term is acquired …

Since the discovery of the ferroelectric perovskite-type oxide BaTiO3 in 1943, numerous
materials have been surveyed as candidates for new ferroelectrics. Perovskite-type …

We review the concept of chirality, at first briefly in a general context then in the specific
framework of the spin networks. We next discuss to what extent neutron scattering appears …

A two-dimensional honeycomb-structured magnet Ni 2 Te 3 O 8 was synthesized,
characterized, and comprehensively investigated for its intriguing physical properties. DC …

The occurrence of the long-range magnetic order of high-spin Fe 3+ ions is found in iron-
containing langasite family crystals A 3 M Fe 3 X 2 O 14 (A= Ba, Sr; M= Sb, Nb, Ta; X= Si …

The conditions for occurrence of the magnetoelectric, magnetoelastic, and piezomagnetic
effects in crystals of the langasite family with a triangular magnetic lattice are considered on …

Violation of time reversal and spatial inversion symmetries has profound consequences for
elementary particles and cosmology. Spontaneous breaking of these symmetries at phase …

The spin-wave excitations emerging from the chiral helically modulated 120° magnetic order
in a langasite Ba 3 NbFe 3 Si 2 O 14 enantiopure crystal were investigated by unpolarized …

Qeltite (IMA2021–032), ideally Ca3Ti (Fe2Si) Si2O14, was found in gehlenite–rankinite–
wollastonite paralava from a pyrometamorphic rock of the Hatrurim Complex at Nabi Musa …

We have investigated spin fluctuations in the langasite compound Ba 3 NbFe 3 Si 2 O 14
both in the ordered state and as a function of temperature. The low-temperature magnetic …