Field-Induced Transitions in Highly Frustrated SrHo2O4

SrHo 2O 4 is a geometrically frustrated magnet in which the magnetic Ho 3 + ions are connected through a network of zigzag chains and coupled by several competing interactions. The Ho 3 + ions show a pronounced Ising anisotropy at low temperatures, and the spins on the two crystallographically inequivalent magnetic sites point along orthogonal crystallographic axes. Using single-crystal neutron diffraction, we report on the development of complex and highly anisotropic short- and long-range magnetic order in SrHo 2O 4 induced by an applied magnetic field. For H ‖ c , the diffuse scattering around the k = 0 positions is suppressed and above 0.5 T the spin structure for one of the Ho sites is long-range and ferromagnetic. For H ‖ b , planes of diffuse scattering at Q = ( h k ± l 2 ) are split by the field, and an up–up–down magnetic order associated with a 1/3-magnetisation plateau develops at 0.8 T. Further increasing the field above 1.2 T allows the second Ho site to also order in a long-range ferromagnetic structure.

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Superconductivity and long range magnetic order in ternary rare earth transition metal borides

10.31274/rtd-180813-7960 ◽

1982 ◽

Author(s):

Herng-Er Horng

Keyword(s):

Rare Earth ◽

Transition Metal ◽

Long Range ◽

Magnetic Order ◽

Range Magnetic Order ◽

Metal Borides ◽

Long Range Magnetic Order

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Calorimetric Studies of Octacyanometalate-based Coordination Polymers Displaying Long-range Magnetic Order

Current Inorganic Chemistry ◽

10.2174/1877944104666140825194745 ◽

2014 ◽

Vol 4 (3) ◽

pp. 146-166 ◽

Cited By ~ 3

Author(s):

Robert Pel.ka

Keyword(s):

Long Range ◽

Coordination Polymers ◽

Magnetic Order ◽

Range Magnetic Order ◽

Calorimetric Studies ◽

Long Range Magnetic Order

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

npj Quantum Materials ◽

10.1038/s41535-021-00345-2 ◽

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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