Polarization analysis in soft X-ray diffraction to study magnetic and orbital ordering

Staub, U.; Scagnoli, V.; Bodenthin, Y.; García-Fernández, Mirian; Wetter, Reto; Mulders, A. M.; Grimmer, H.; Horisberger, M.

doi:10.1107/s0909049508019614

Cited by 67 publications

(68 citation statements)

References 33 publications

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“…Capacitance measurements were performed by an Agilent E4980A LCR meter with an AC voltage of 100 mV and FE hysteresis was probed through the Positive-Up Negative-Down (double-wave) method. 32 Magnetic order was probed by resonant soft x-ray diffraction experiments (RSXD) using the RESOXS UHV diffraction end station 33 at the SIM beam line 34 of the Swiss Light Source (SLS). Applied photon energies correspond to the Mn L 3 absorption edge (2p → 3d, ~ 643 eV).…”

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confidence: 99%

Multiferroic properties of uniaxially compressed orthorhombic HoMnO3 thin films

Shimamoto

Windsor

et al. 2016

Applied Physics Letters

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Multiferroic properties of orthorhombic HoMnO 3 (Pbnm space group) are significantly modified by epitaxial compressive strain along the a-axis. We are able to focus on the effect of strain solely along the a-axis by using an YAlO 3 (010) substrate, which has only a small lattice mismatch with HoMnO 3 along the other in-plane direction (the c-axis). Multiferroic properties of strained and relaxed HoMnO 3 thin films are compared with those reported for bulk, and are found to differ widely. A relaxed film exhibits bulk-like properties such as a ferroelectric transition temperature of 25 K and an incommensurate antiferromagnetic order below 39 K, with an ordering wave vector of (0 q b 0) with q b ≈ 0.41 at 10 K. A strained film becomes ferroelectric already at 37.5 K and has an incommensurate magnetic order with q b ≈ 0.49 at 10 K.

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confidence: 99%

Multiferroic properties of uniaxially compressed orthorhombic HoMnO3 thin films

Shimamoto

Windsor

et al. 2016

Applied Physics Letters

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“…The x-ray photon energy was tuned to the Mn L2 absorption edge, which gives enhanced sensitivity to the first-order (0q0) spin-cycloid reflection [7]. The static magnetic ordering has been characterized in detail using the soft x-ray resonant diffraction station RESOXS [19] at the SIM beamline [20] of the Swiss Light Source. The FEL was operated at a repetition rate of 60 Hz.…”

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Magnetic order dynamics in optically excited multiferroicTbMnO3

Johnson¹,

Kubacka²,

Hoffmann³

et al. 2015

Phys. Rev. B

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We performed ultrafast time-resolved near-infrared pump, resonant soft X-ray diffraction probe measurements to investigate the coupling between the photoexcited electronic system and the spin cycloid magnetic order in multiferroic TbMnO3 at low temperatures. We observe melting of the long range antiferromagnetic order at low excitation fluences with a decay time constant of 22.3 ± 1.1 ps, which is much slower than the ~1 ps melting times previously observed in other systems. To explain the data we propose a simple model of the melting process where the pump laser pulse directly excites the electronic system, which then leads to an increase in the effective temperature of the spin system via a slower relaxation mechanism. Despite this apparent increase in the effective spin temperature, we do not observe changes in the wavevector q of the antiferromagnetic spin order that would typically correlate with an increase in temperature under equilibrium conditions. We suggest that this behavior results from the extremely low magnon group velocity that hinders a change in the spin-spiral wavevector on these time scales.2

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“…Polarization analysis of the scattered radiation was performed using a graded W/C multilayer setup. 27,29 Rotations around the Bragg wave vector (azimuthal angle Ψ) used the rotatable sample transfer fork with accuracy better than five degrees. An azimuthal angle of zero degrees (Ψ = 0…”

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confidence: 99%

Magnetic structure and electric field effects in multiferroic YMn2O5

et al. 2011

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The magnetic structure of multiferroic RMn2O5 (R=Y,Er) has been investigated by means of resonant soft x-ray diffraction. Energy, temperature and azimuthal angle scans were performed in addition to reciprocal space maps on the magnetic reflection in the different magnetic phases of YMn2O5. We also investigated the orbital magnetic moment at the oxygen K-edge for RMn2O5 with both, R= Y and Er compositions. These moments reflect the strong hybridization between Mn 3d and oxygen 2p states. Experiments with applied electric fields are additionally presented, showing that the helical component of the magnetic structure in the CM phase of YMn2O5 can be reversed by the application of an electric field. However, the incommensurate magnetic reflection in the high temperature phase is unaffected. Interestingly, this is observed only in the presence of a small electrical current, indicative of a current induced/enhanced switching of magnetic domains.

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Polarization analysis in soft X-ray diffraction to study magnetic and orbital ordering

Cited by 67 publications

References 33 publications

Multiferroic properties of uniaxially compressed orthorhombic HoMnO3 thin films

Multiferroic properties of uniaxially compressed orthorhombic HoMnO3 thin films

Magnetic order dynamics in optically excited multiferroicTbMnO3

Magnetic structure and electric field effects in multiferroic YMn2O5

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