Single-crystal neutron diffractometry — Recent developments and trends

2003 ◽  
Vol 218 (2) ◽  
Author(s):  
H. A. Graf
Keyword(s):  
Neutron Scattering ◽  
Single Crystal ◽  
Magnetic Order ◽  
The United States ◽  
Range Magnetic Order ◽  
Scattering Center ◽  
Recent Developments ◽  
Spallation Source ◽  
Under Construction ◽  
Long Range Magnetic Order

AbstractAn overview is given over recent developments and trends in single-crystal neutron diffractometry. Special emphasis is put on instrumental developments which have considerably enhanced the efficiency of neutron scattering experiments over the last years by improving monochromator and/or detector systems. Not discussed are developments in the field of polarised neutrons. Examples from the Berlin Neutron Scattering Center (BENSC) are given for the measurement of short-range magnetic order using the flat-cone diffractometer E2 of BENSC and of the study of long-range magnetic order making use of a high-field cryomagnet at BENSC. The perspectives of neutron diffractometry within the next 5 to 10 years are discussed with view on the new powerful spallation sources SNS (under construction in the United States), JSNS (under construction in Japan) and ESS, the European Spallation Source, planned to be constructed in Europe.

Neutron scattering on the strongly correlated electron CeNi Cu system: from non-magnetic behaviour to long-range magnetic order

2000 ◽  
Vol 18 (4) ◽  
pp. 625-632 ◽  
Author(s):  
J.I. Espeso ◽  
J. García Soldevilla ◽  
J.A. Blanco ◽  
J. Rodríguez Fernández ◽  
J.C. Gómez Sal ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Long Range ◽  
Magnetic Order ◽  
Magnetic Behaviour ◽  
Strongly Correlated ◽  
Strongly Correlated Electron ◽  
Range Magnetic Order ◽  
Correlated Electron ◽  
Long Range Magnetic Order

Neutron scattering studies of the coexistence of long‐range magnetic order and superconductivity in Dy1.2Mo6S8and Tb1.2Mo6S8

1979 ◽  
Vol 50 (B3) ◽  
pp. 1981-1983 ◽  
Author(s):  
W. Thomlinson ◽  
G. Shirane ◽  
D. E. Moncton ◽  
M. Ishikawa ◽  
O/. Fischer
Keyword(s):  
Neutron Scattering ◽  
Long Range ◽  
Magnetic Order ◽  
Range Magnetic Order ◽  
Long Range Magnetic Order

scholarly journals Emergent long-range magnetic order in ultrathin (111)-oriented LaNiO3 films

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Margaret M. Kane ◽  
Arturas Vailionis ◽  
Lauren J. Riddiford ◽  
Apurva Mehta ◽  
Alpha T. N’Diaye ◽  
...  
Keyword(s):  
Long Range ◽  
Degrees Of Freedom ◽  
Magnetic Order ◽  
Magnetic Ordering ◽  
Anomalous Hall Effect ◽  
X Ray Diffraction ◽  
X Ray ◽  
Range Magnetic Order ◽  
Film Substrate ◽  
Long Range Magnetic Order

AbstractThe emergence of ferromagnetism in materials where the bulk phase does not show any magnetic order demonstrates that atomically precise films can stabilize distinct ground states and expands the phase space for the discovery of materials. Here, the emergence of long-range magnetic order is reported in ultrathin (111) LaNiO3 (LNO) films, where bulk LNO is paramagnetic, and the origins of this phase are explained. Transport and structural studies of LNO(111) films indicate that NiO6 octahedral distortions stabilize a magnetic insulating phase at the film/substrate interface and result in a thickness-dependent metal–insulator transition at t = 8 unit cells. Away from this interface, distortions relax and bulk-like conduction is regained. Synchrotron x-ray diffraction and dynamical x-ray diffraction simulations confirm a corresponding out-of-plane unit-cell expansion at the interface of all films. X-ray absorption spectroscopy reveals that distortion stabilizes an increased concentration of Ni2+ ions. Evidence of long-range magnetic order is found in anomalous Hall effect and magnetoresistance measurements, likely due to ferromagnetic superexchange interactions among Ni2+–Ni3+ ions. Together, these results indicate that long-range magnetic ordering and metallicity in LNO(111) films emerges from a balance among the spin, charge, lattice, and orbital degrees of freedom.

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