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Title: Nonmonotonic crossover in electronic phase separated manganite superlattices driven by the superlattice period

Journal Article · · Physical Review B

Studying manganite superlattices [(LCMO)2n / (PCMO)n]t made of La0.625Ca0.375MnO3 (LCMO) and Pr0.625Ca0.375MnO3 (PCMO), we found an unexpected behavior varying the period n. At small n, the ensemble is a three-dimensional ferromagnetic metal due to interfacial charge transfer. At large n , the LCMO layers dominate transport. However, rather than a smooth interpolation between these limits a sharp transport and magnetic anomaly is found at an intermediate critical PCMO thickness n*. Magnetic force microscopy reveals that the phase-separation length scale also maximizes at n* where, unexpectedly, it becomes comparable to that of the (La1-yPry)0.625Ca0.375MnO3 (LPCMO) alloy. Finally, we conjecture the phenomenon originates in a disorder-related length scale: Large charge-ordered clusters as in LPCMO can only nucleate when Pr-rich regions reach a critical size related to n*.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division; National Key Research Program of China; National Basic Research Program of China; National Natural Science Foundation of China (NSFC); Shanghai Municipal Natural Science Foundation; USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704; 2016YFA0300702; 2014CB921104; 11504053; 11904052; 18XD1400600; 17ZR1442600; 18JC141140; 18ZR1403200; AC05-00OR22725
OSTI ID:
1756297
Alternate ID(s):
OSTI ID: 1822086
Report Number(s):
BNL-220775-2021-JAAM; TRN: US2205619
Journal Information:
Physical Review B, Vol. 102, Issue 23; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

References (37)

Electric control of the magnetization in BiFeO 3 /LaFeO 3 superlattices journal August 2013
Colossal magnetoresistant materials: the key role of phase separation journal April 2001
Magnetic-field-induced metal-insulator phenomena in Pr 1 − x Ca x Mn O 3 with controlled charge-ordering instability journal January 1996
Tuning Perpendicular Magnetic Anisotropy by Oxygen Octahedral Rotations in ( La 1 − x Sr x MnO 3 ) / ( SrIrO 3 ) Superlattices journal August 2017
Percolative phase separation underlies colossal magnetoresistance in mixed-valent manganites journal June 1999
Electrophoretic-like Gating Used To Control Metal–Insulator Transitions in Electronically Phase Separated Manganite Wires journal July 2013
Complexity in Strongly Correlated Electronic Systems journal July 2005
Direct Imaging of Nanoscale Phase Separation in La 0.55 Ca 0.45 MnO 3 : Relationship to Colossal Magnetoresistance journal August 2009
Nanoscale Phase Separation and Colossal Magnetoresistance book January 2003
Chemical ordering suppresses large-scale electronic phase separation in doped manganites journal April 2016
Open questions in CMR manganites, relevance of clustered states and analogies with other compounds including the cuprates journal January 2005
Effect of A -site cation ordering on the magnetoelectric properties in [ ( LaMnO 3 ) m / ( SrMnO 3 ) m ] n artificial superlattices journal October 2002
Direct experimental evidence of physical origin of electronic phase separation in manganites journal March 2020
Tailoring Magnetic Interlayer Coupling in La 0.7 Sr 0.3 MnO 3 / SrRuO 3 Superlattices journal April 2010
Work function of the mixed-valent manganese perovskites journal June 2004
Critical fluctuations upon photoinduced phase transition in manganite strips journal May 2018
Tunable ferroelectricity in artificial tri-layer superlattices comprised of non-ferroic components journal January 2012
Electronic phase separation at the LaAlO3/SrTiO3 interface journal February 2011
Visualization of Localized Holes in Manganite Thin Films with Atomic Resolution journal December 2005
Nanoscale Multiphase Separation at La 2 / 3 Ca 1 / 3 MnO 3 / SrTiO 3 Interfaces journal July 2001
Dielectrophoresis model for the colossal electroresistance of phase-separated manganites journal October 2007
Direct Observation of Percolation in a Manganite Thin Film journal September 2002
Enhanced ordering temperatures in antiferromagnetic manganite superlattices journal October 2009
Interfacial Structure of Manganite Superlattice journal July 2011
Microscopic simulation of the percolation of manganites journal January 2005
Exchange bias in LaNiO3–LaMnO3 superlattices journal January 2012
Giant Cluster Coexistence in Doped Manganites and Other Compounds journal June 2000
Magnetically Tunable Metal-Insulator Superlattices journal January 2010
Emergent phenomena in manganites under spatial confinement journal January 2013
Spatial confinement tuning of quenched disorder effects and enhanced magnetoresistance in manganite nanowires journal October 2019
Colossal magnetoresistive manganites journal October 1999
Colossal Effects in Transition Metal Oxides Caused by Intrinsic Inhomogeneities journal December 2001
Artificial charge-modulationin atomic-scale perovskite titanate superlattices journal September 2002
Correlating interfacial octahedral rotations with magnetism in (LaMnO3+δ)N/(SrTiO3)N superlattices journal July 2014
Low Temperature Magnetoresistance and the Magnetic Phase Diagram of La 1 − x Ca x MnO 3 journal October 1995
Relaxation between charge order and ferromagnetism in manganites: Indication of structural phase separation journal December 2000
Atomic-scale control of magnetic anisotropy via novel spin–orbit coupling effect in La 2/3 Sr 1/3 MnO 3 /SrIrO 3 superlattices journal May 2016