Magnetic and structural changes in LaCo0.9Mn0.1O3 at high pressure. (21st December 2017)

• Record Type: Journal Article
• Authors: Capone, M; Ridley, C J; Funnell, N P; Stenning, G B G; Loveday, J S; Guthrie, M; Bull, C L
• Is Part Of: Journal of physics. Volume 30:Number 3(2018)
• Publication Date: 2017-12-21
• Subjects: high-pressure -- magnetism -- neutron-diffraction -- perovskite; Condensed matter -- Periodicals; Matière condensée -- Périodiques; Vaste stoffen; Vloeistoffen; Natuurkunde; Electronic journals; Computer network resources; 530.4105
• DOI: 10.1088/1361-648X/aaa042
• Languages: English
• ISSNs: 0953-8984

Abstract

Abstract: The structural and magnetic properties of LaCo0.9 Mn0.1 O3 have been studied as a function of pressure by neutron powder diffraction and DC magnetometry. The material is confirmed to exhibit rhombohedral R 3 ̄ c symmetry between ambient pressure and 6 GPa. We have determined the bulk modulus B 0 of the sample using a second-order Birch–Murnaghan equation of state which yielded: B 0 = 140(9) GPa and V 0 = 112.7 ( 2 ) A ˚ 3 . We report a non-linear increase of the Curie temperature T C from an ambient pressure value of 224.7 K to ̃236 K at a pressure of 4 GPa. Finally, we confirm the glassy-like nature of the magnetism in LaCo0.9 Mn0.1 O3, which is maintained throughout the pressure range explored.