Evolution of electronic and magnetic properties in a series of iridate double perovskites Pr2-xSrxMgIrO6 (x=0, 0.5, 1.0)

@article{ ISI:000482210800003,
Author = {Bandyopadhyay, Abhisek and Carlomagno, Ilaria and Simonelli, Laura and
   Sala, M. and Efimenko, A. and Meneghini, Carlo and Ray, Sugata},
Title = {{Evolution of electronic and magnetic properties in a series of iridate
   double perovskites Pr2-xSrxMgIrO6 (x=0, 0.5, 1.0)}},
Journal = {{PHYSICAL REVIEW B}},
Year = {{2019}},
Volume = {{100}},
Number = {{6}},
Month = {{AUG 22}},
Abstract = {{Spin-orbit coupling (SOC) plays a crucial role in magnetic and
   electronic properties of 5d iridates. In this paper we have
   experimentally investigated the structural and physical properties of a
   series of Ir-based double perovskite compounds Pr2-xSrxMgIrO6(x = 0,
   0.5, 1; hereafter abbreviated as PMIO, PSMIO1505, and PSMIO).
   Interestingly, these compounds have recently been proposed to undergo a
   transition from the spin-orbit-coupled Mott insulating phase at x = 0 to
   the elusive half-metallic antiferromagnetic (HMAFM) state with Sr doping
   at x = 1. However, our detailed magnetic and electrical measurements
   refute any kind of HMAFM possibility in either of the doped samples. In
   addition, we establish that within these Pr2-xSrxMgIrO6 double
   perovskites, changes in Ir-oxidation states (4+ for PMIO to 5+ for PSMIO
   via mixed 4+/5+ for PSMIO1505) lead to markedly different magnetic
   behaviors. While SOC on Ir is at the root of the observed insulating
   behaviors for all three samples, the correlated magnetic properties of
   these three compounds develop entirely due to the contribution from
   local Ir moments. Additionally, the magnetic Pr3+ (4f(2)) ions, instead
   of showing any kind of ordering, only contribute to the total
   paramagnetic moment. It is seen that the PrSrMgIrO6 sample does not
   order down to 2 K despite antiferromagnetic interactions. But, the d(5)
   iridate Pr2MgIrO6 shows a sharp antiferromagnetic (AFM) transition at
   around 14 K, and in the mixed valent Pr1.5Sr0.5MgIrO6 sample the AFM
   transition is shifted to a much lower temperature (similar to 6 K) due
   to weakening of the AFM exchange.}},
Publisher = {{AMER PHYSICAL SOC}},
Address = {{ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA}},
Type = {{Article}},
Language = {{English}},
Affiliation = {{Bandyopadhyay, A (Corresponding Author), Indian Assoc Cultivat Sci, Sch Mat Sci, 2A & 2B Raja SC Mullick Rd, Kolkata 700032, India.
   Bandyopadhyay, Abhisek; Ray, Sugata, Indian Assoc Cultivat Sci, Sch Mat Sci, 2A & 2B Raja SC Mullick Rd, Kolkata 700032, India.
   Carlomagno, Ilaria; Meneghini, Carlo, Univ Roma Tre, Dipartimento Sci, Via Vasca Navale 84, I-00146 Rome, Italy.
   Simonelli, Laura, ALBA Synchrotron Light Source, Expt Div, BL22 CLAESS Core Level Absorpt & Emiss Spect Beam, Ctra BP 1413 Km 3,3, Barcelona 08290, Spain.
   Sala, M.; Efimenko, A., ESRF European Synchrotron, 71 Ave Martyrs, F-38000 Grenoble, France.
   Sala, M., Politecn Milan, Dipartimento Fis, Pzza Leonardo da Vinci 32, I-20133 Milan, Italy.}},
DOI = {{10.1103/PhysRevB.100.064416}},
Article-Number = {{064416}},
ISSN = {{2469-9950}},
EISSN = {{2469-9969}},
Keywords-Plus = {{CRYSTAL-GROWTH; IRIDIUM; XANES; PR; LA; LN}},
Research-Areas = {{Materials Science; Physics}},
Web-of-Science-Categories  = {{Materials Science, Multidisciplinary; Physics, Applied; Physics,
   Condensed Matter}},
Author-Email = {{msab3@iacs.res.in}},
ResearcherID-Numbers = {{Moretti, Marco/AAF-9255-2019
   meneghini, carlo/F-7761-2013
   }},
ORCID-Numbers = {{Moretti, Marco/0000-0002-9744-9976
   meneghini, carlo/0000-0003-4846-8422
   Bandyopadhyay, Abhisek/0000-0001-9332-8985
   Carlomagno, Ilaria/0000-0003-3736-1558}},
Funding-Acknowledgement = {{CSIR, IndiaCouncil of Scientific & Industrial Research (CSIR) - India;
   IACSDepartment of Science & Technology (India)Indian Association for
   the Cultivation of Science (IACS) - Jadavpur; Department of Science and
   Technology (DST)Department of Science & Technology (India)
   {[}WTI/2K15/74]}},
Funding-Text = {{A.B. thanks CSIR, India and IACS for supporting fellowship. S.R.
   akcnowledges the Department of Science and Technology (DST) {[}Project
   No. WTI/2K15/74] for support. A.B. and S.R. thank Jawaharlal Nehru
   Centre for Advanced Scientific Research from DST-Synchrotron-Neutron
   project, for performing experiments at ESRF (Proposal No. HC-2872) and
   CLAESS beamline of ALBA (Barcelona, Spain) synchrotron radiation
   facility. The authors also thank TRC-DST of IACS for providing
   experimental facilities.}},
Number-of-Cited-References = {{50}},
Times-Cited = {{2}},
Usage-Count-Last-180-days = {{3}},
Usage-Count-Since-2013 = {{21}},
Journal-ISO = {{Phys. Rev. B}},
Doc-Delivery-Number = {{IS5RS}},
Unique-ID = {{ISI:000482210800003}},
DA = {{2020-12-22}},
}