Synthesis, crystal structure, and properties of metallic PrNiO3: Comparison with metallic NdNiO3 and semiconducting SmNiO3

Electronic transitions in strained SmNiO3 thin films

“…The 1st order character of the AFM ordering was observed in the NNO films as well (Figure 3(f)), confirming previously reported results. 2,4,31,32 (Figure 3(b)), bearing out its induced nature, as already observed in the bulk nickelate 4 and in NNO thin films. 31 The same behavior at the RE resonance was reproduced in all the SNO and NNO films investigated.…”

“…The Ni-O-Ni angle (Φ) deviates from 180 • and therefore tunes the hopping integral between the O 2p and Ni 3d orbitals, which in turn governs the effective bandwidth (W ) of the system. 4 Φ depends on the R radius or, equivalently, on the perovskite tolerance factor t. 4,5 Exploiting a variety of tools, such as chemical substitution, [2][3][4] hydrostatic pressure, [5][6][7] and, in the case of thin films, epitaxial strain, [8][9][10] it has been shown that T MI monotonically decreases as Φ approaches 180 • , and eventually only the metallic phase is observed for sufficiently small structural distortion. 5,7,[10][11][12] Concomitant to the MIT, a change of symmetry from the orthorhombic Pbnm to the monoclinic P2 1 /n space group is reported.…”

“…The AFM structure gives rise to a magnetic diffraction peak with the Bragg vector q Bragg = ( 1 4 1 4 1 4 ), in pseudo-cubic (pc) notation. 2,3,17,18 The magnetic phase seems to arise from the bond a Author to whom correspondence should be addressed. disproportionated insulating phase.…”

“…The members with R smaller than Nd display a 2nd order magnetic transition at T Néel < T MI , where the Néel temperature increases slightly with R. 18 In contrast, for Nd and larger R, T Néel = T MI and the magnetic ordering shares the R dependence of the MIT and its 1st order character. 2,19 Most of the experimental work performed on thin films has been focused on the properties of RNO with T Néel = T MI , partly due to the difficulties in synthesizing compounds with a more distorted (R < Nd) structure. 20 However, interest in more distorted RNO has been renewed by recent results, [21][22][23][24] confirming their potential for both fundamental physics 23 and applied research.…”

The influence of plasma dynamics on the growth of Sm0.55Nd0.45NiO3 solid solution during pulsed laser deposition

“…Such unusual electronic and optical features are of great interest since the Metal-Insulator Transition Temperature (T MIT ) can be tuned by changing the Re cation or by forming a solid solution [2][3][4].…”