Details

Autor(en) / Beteiligte

• Matsuura, Keisuke
• Sagayama, Hajime
• Uehara, Amane
• Nii, Yoichi
• Kajimoto, Ryoichi
• Kamazawa, Kazuya
• Ikeuchi, Kazuhiko
• Ji, Sungdae
• Abe, Nobuyuki
• Arima, Taka-hisa

Titel

Magnetic excitations in the orbital disordered phase of MnV2O4

Ist Teil von

• Physica. B, Condensed matter, 2018-05, Vol.536, p.372-376

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2018

Link zum Volltext

Quelle

Elsevier ScienceDirect Journals Complete

Beschreibungen/Notizen

• We have investigated the temperature dependence of magnetic dynamics in a spinel-type vanadium oxide MnV2O4 by inelastic neutron scattering. The scattering intensity of excitation around 20meV disappears in the collinear intermediate-temperature cubic-ferrimagnetic phase, which reveals that this excitation should be peculiar to the orbital ordered phase. We have found a weakly dispersive mode emergent from a non-integer wavevector (1.4,1.4,0) at 56K, which lies in the cubic-ferrimagnetic phase between non-coplanar ferrimagnetic and paramagnetic phases. This indicates that the probable presence of an incommensurate instability in the simple collinear structure.