Understanding the magnetic dynamics and magnetostructural coupling in the paramagnetic phase of TbMnO3 by muon-spin spectroscopy

• Type: Article in International Scientific Journal
• Date: 2023

Authors

Vilarinho, R (Author) Other; Vilao, RC (Author) Other; Alberto, H (Author) Other; Marinopoulos, AG (Author) Other; Gil, JM (Author) Other; Luetkens, H (Author) Other; Guguchia, Z (Author) Other; Mihalik, M (Author) Other; Mihalik, M Jr (Author) Other; Agostinho Moreira, JA (Author) FCUP

Journal

The Journal is awaiting validation by the Administrative Services.

Title: PHYSICAL REVIEW B

Vol. 108

ISSN: 2469-9950

Indexing

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Other information

Authenticus ID: P-00Z-8X0

DOI: 10.1103/physrevb.108.174401

Abstract (EN): In this work we present a comprehensive study of the spin dynamics and fluctuations in the ordered magnetic phases of the prototype multiferroic material TbMnO3. From the temperature dependence of the dynamical and static components of the time-dependent asymmetry, we demonstrate the existence of strong local magnetic-field disorder arising from the modulated Mn3+ spin arrangement and the effect of the Tb3+ ordering at low temperatures. We provide evidence for an unusual magnetostructural coupling in the paramagnetic phase of TbMnO3 by means of muon spin spectroscopy. No short-range magnetic ordering definitively occurs in the paramagnetic phase and the unusual properties found in the temperature dependence of the magnetic susceptibility are due to a magnetostructural coupling, likely involving oxygen displacements.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9