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Title: Selective excitation of spin resonance in orthoferrite PrFeO{sub 3} with impulsive polarized terahertz radiation

Single cycle terahertz (THz) pulses were employed to excite coherent spin waves in (110)-oriented PrFeO{sub 3} single crystal. The free induction decay radiations at frequency of 0.34 THz (quasi-ferromagnetic mode, FM mode) and 0.41 THz (quasi-antiferromagnetic mode, AFM mode) were observed arising from the coupling of magnetic moment with the impulsive magnetic field of polarized terahertz radiation. These two spin modes in PrFeO{sub 3} can be excited and modulated by the magnetic field of THz pulse with a specific polarization with respect to the crystal axis. The extracted complex dielectric permittivity and magnetic permeability dispersion in THz range suggest a higher efficiency of energy transfer from the impulsive THz pulse into the AFM than the FM spin system.
Authors:
; ; ; ; ; ;  [1]
  1. Department of Physics, Shanghai University, Shanghai 200444 (China)
Publication Date:
OSTI Identifier:
22267758
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 114; Journal Issue: 24; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANTIFERROMAGNETISM; ATOMIC FORCE MICROSCOPY; DIELECTRIC MATERIALS; ENERGY TRANSFER; EXCITATION; MAGNETIC FIELDS; MAGNETIC MOMENTS; MAGNETIC SUSCEPTIBILITY; MONOCRYSTALS; PERMITTIVITY; PULSES; RESONANCE; SPIN; SPIN WAVES; THZ RANGE