Search Results

You searched for all publications:

with publication states 'Published' 'Published (Approved)'

Search Again...

These results include publications that have not yet been reviewed and processed by Diamond Light Source. To view only processed publications click here.

You can use the folder icon under Actions to collate papers as required. You can then click on View Folder in the left-hand navigation to review and/or download your folder.

Exact matches
Related results

2 items found (0 items not approved), displaying all items.1

Instruments / Technical Area	Publication Details	Published	Actions
	Multiferroic phase diagram of E -type R MnO 3 films studied by neutron and x-ray diffraction Saumya Mukherjee , Kenta Shimamoto , Yoav William Windsor , Mahesh Ramakrishnan , Sergii Parchenko , Urs Staub , Laurent Chapon , Bachir Ouladdiaf , Marisa Medarde , Tian Shang , Elisabeth A. Müller , Michel Kenzelmann , Thomas Lippert , Christof W. Schneider , Christof Niedermayer Physical Review B 98 DOI: 10.1103/PhysRevB.98.174416 Show Abstract ▼ Abstract: We present a generalized multiferroic phase diagram for orthorhombic RMnO3(R=Gd–Lu) based on coherently grown thin films. The magnetic order was identified by neutron-diffraction and resonant soft x-ray scattering experiments. For large R-ions (R=Gd–Dy), the transition temperature to a long-range ordered antiferromagnetic phase is only weakly dependent on the R-ion radius, but decreases monotonically with decreasing R-ion radius for films with R=Ho–Lu. The antiferromagnetic phase is characterized by an incommensurate order of the Mn3+ spins, which successively locks into a commensurate E-type state. These findings confirm a uniform multiferroic ground state independent of the R ion and are in excellent agreement with predicted properties of strain-induced multiferroicity in these materials. In particular, strong variation of multiferroic properties in these epitaxial films compared to bulk highlights the tuning ability of strain.	Nov 2018
I06-Nanoscience	Dynamic pathway of the photoinduced phase transition of TbMnO 3 Elisabeth M. Bothschafter , Elsa Abreu , Laurenz Rettig , Teresa Kubacka , Sergii Parchenko , Michael Porer , Christian Dornes , Yoav William Windsor , Mahesh Ramakrishnan , Aurora Alberca , Sebastian Manz , Jonathan Saari , Seyed M. Koohpayeh , Manfred Fiebig , Thomas Forrest , Philipp Werner , Sarnjeet S. Dhesi , Steven L. Johnson , Urs Staub Physical Review B 96 DOI: 10.1103/PhysRevB.96.184414 Diamond Proposal Number(s): [13355, 13926] Show Abstract ▼ Abstract: We investigate the demagnetization dynamics of the cycloidal and sinusoidal phases of multiferroic TbMnO3 by means of time-resolved resonant soft x-ray diffraction following excitation by an optical pump. The use of orthogonal linear x-ray polarizations provides information on the contribution from the different magnetic moment directions, which can be interpreted as signatures from multiferroic cycloidal spin order and sinusoidal spin order. Tracking these signatures in the time domain enables us to identify the transient magnetic phase created by intense photoexcitation of the electrons and subsequent heating of the spin system on a picosecond time scale. The transient phase is shown to exhibit mostly spin density wave character, as in the adiabatic case, while nevertheless retaining the wave vector of the cycloidal long-range order. Two different pump photon energies, 1.55 and 3.1 eV, lead to population of the conduction band predominantly via intersite d−d or intrasite p−d transitions, respectively. We find that the nature of the optical excitation does not play an important role in determining the dynamics of magnetic order melting. Further, we observe that the orbital reconstruction, which is induced by the spin ordering, disappears on a time scale comparable to that of the cycloidal order, attesting to a direct coupling between magnetic order and orbital reconstruction. Our observations are discussed in the context of recent theoretical models of demagnetization dynamics in strongly correlated systems, revealing the potential of this type of measurement as a benchmark for such theoretical studies.	Nov 2017

Publications Database

Search Results

You searched for all publications:

Search Again...

Subject Areas (check all that apply) select all

Instruments used to collect data (check all that apply) select all

Collaborations involved (check all that apply) select all

Diamond Offline Facilities used

Relevant Technical Areas (check all that apply) select all

Menu for Anonymous User