Magnetic properties and their correlation with lattice dynamics in HoFe1-xCrxO3 (0 ≤ x ≤ 1) compounds

Kotnana, Ganesh and J, Suryanarayana (2018) Magnetic properties and their correlation with lattice dynamics in HoFe1-xCrxO3 (0 ≤ x ≤ 1) compounds. PhD thesis, Indian Institute of Technology Hyderabad.

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Perovskites with general formula ABO3 (A is rare earth ion or Yttrium and B is a transition metal) have been the most versatile compounds in oxide research. Among various perovskite oxides, rare earth orthoferrite (RFeO3) and orthochromite (RCrO3) compounds with distorted perovskite structure have drawn considerable attention due to their unique physical properties and potential applications. Among RFeO3 compounds, holmium orthoferrite (HoFeO3) has been studied extensively for ultrafast recording applications. The crystal structure of HoFeO3 is orthorhombic with a space group of Pbnm at room temperature and possesses G-type antiferromagnetic with a magnetic ordering temperature (TN) around 641 K. Apart from TN, HoFeO3 exhibits the spin reorientation (SR) transition of Fe3+ at 50 - 60 K. According to Goodenough-Kanamori theory, Cr3+ is best choice for Fe3+ to show superior magnetic properties due to super exchange interactions, which may exhibit interesting magnetic properties and lattice dynamics. Hence, in this thesis we explored the structural, magnetic properties and their correlation with lattice dynamics in HoFe1- xCr xO 3 (0 ≤ x ≤ 1) compounds.

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IITH Creators:
IITH CreatorsORCiD
J, SuryanarayanaUNSPECIFIED
Item Type: Thesis (PhD)
Uncontrolled Keywords: Orthoferrite, Spin-Phonon Coupling, Spin Reorientation, Magnetism
Subjects: Physics
Divisions: Department of Physics
Depositing User: Team Library
Date Deposited: 04 Jul 2018 10:24
Last Modified: 21 Sep 2019 06:18
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