@ARTICLE{Ryzhov2015117,
author={Ryzhov, V.A. and Khavronin, V.P. and Deriglazov, V.V. and Mukovskii, Y.M. and Chichkov, V.I.},
title={Magneto-electronic phase separation in la0.7sr0.3mno3 with metallic behavior in paramagnetic region},
journal={Solid State Phenomena},
year={2015},
volume={233-234},
pages={117-120},
doi={10.4028/www.scientific.net/SSP.233-234.117},
note={cited By 1; Conference of 6th Moscow International Symposium on Magnetism, MISM 2014 ; Conference Date: 29 June 2014 Through 3 July 2014;  Conference Code:122919},
url={https://www.scopus.com/inward/record.uri?eid=2-s2.0-84945198970&doi=10.4028%2fwww.scientific.net%2fSSP.233-234.117&partnerID=40&md5=47477a0e2d5594f1fe5803c3f77614e7},
affiliation={Petersburg Nuclear Physics Institute, NRC ‘Kurchatov Institute’, Gatchina, 188300, Russian Federation; National Research and Technology University, MISiS, Moscow, 119049, Russian Federation},
abstract={The data on transport and magnetic properties (ac linear and nonlinear (second and third orders) susceptibilities) are presented for La0.7Sr0.3MnO3 single crystal with metallic behavior in paramagnetic (PM) region and ferromagnetic (FM) metallic ground state. The FM clusters originate in the PM matrix of the compound below some temperature T* > 425 K, their nonlinear response being weakly T-dependent down to 367 K. This was attributed to clusters arising in the preferable sites formed by chemical inhomogeneities introduced by doping. On cooling below T# ≈ 366 K > TC ≈ 363.3 K, a fast growth of cluster response without the change of its parameters is observed that was attributed to the development of homogeneous nucleation of the FM clusters. The latter stage continues below TC and is accompanied by a crossover to the steeper decreasing of resistivity with cooling that suggests metallic properties of the clusters. The cluster nonlinear response masks completely that of matrix at T = 360.3 K < TC, where it is well described by the model of ensemble of magnetic single-domain nanoparticles in superparamagnetic regime based on the formalism involving Gilbert-Landau-Lifshits equation. Below TD = 359.6 K at the stage of domain formation, a weak interaction of matrix and cluster subsystems leads to their mutual ordering, which is accompanied by a sharp decrease of the nonlinear response to a weak ac field in small steady field H. The latter suggests an “antiferromagnetic” type of arrangement of these subsystems that provides decreasing the magnetostatic energy of the sample. © (2015) Trans Tech Publications, Switzerland.},
author_keywords={Ac susceptibility;  Doped manganites;  Magnetic phase transitions;  Magneto-electronic phase separation;  Nonlinear response to a weak ac field},
correspondence_address1={Ryzhov, V.A.; Petersburg Nuclear Physics Institute, NRC ‘Kurchatov Institute’Russian Federation},
editor={Perov N., Semisalova A.},
sponsors={Electromagnetics of Russian Academy of Sciences; et al; Institute for Theoretical and Applied; Japan Society for the Promotion of Science; Lomonosov Moscow State University; Russian Foundation for Basic Research},
publisher={Trans Tech Publications Ltd},
issn={16629779},
isbn={9783038354826},
language={English},
abbrev_source_title={Solid State Phenomena},
document_type={Conference Paper},
source={Scopus},
}

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The FM clusters originate in the PM matrix of the compound below some temperature T* > 425 K, their nonlinear response being weakly T-dependent down to 367 K. This was attributed to clusters arising in the preferable sites formed by chemical inhomogeneities introduced by doping. On cooling below T# ≈ 366 K > TC ≈ 363.3 K, a fast growth of cluster response without the change of its parameters is observed that was attributed to the development of homogeneous nucleation of the FM clusters. The latter stage continues below TC and is accompanied by a crossover to the steeper decreasing of resistivity with cooling that suggests metallic properties of the clusters. The cluster nonlinear response masks completely that of matrix at T = 360.3 K < TC, where it is well described by the model of ensemble of magnetic single-domain nanoparticles in superparamagnetic regime based on the formalism involving Gilbert-Landau-Lifshits equation. Below TD = 359.6 K at the stage of domain formation, a weak interaction of matrix and cluster subsystems leads to their mutual ordering, which is accompanied by a sharp decrease of the nonlinear response to a weak ac field in small steady field H. The latter suggests an “antiferromagnetic” type of arrangement of these subsystems that provides decreasing the magnetostatic energy of the sample. © (2015) Trans Tech Publications, Switzerland.","author_keywords":"Ac susceptibility; Doped manganites; Magnetic phase transitions; Magneto-electronic phase separation; Nonlinear response to a weak ac field","correspondence_address1":"Ryzhov, V.A.; Petersburg Nuclear Physics Institute, NRC ‘Kurchatov Institute’Russian Federation","editor":[{"propositions":[],"lastnames":["Perov","N."],"firstnames":["Semisalova","A."],"suffixes":[]}],"sponsors":"Electromagnetics of Russian Academy of Sciences; et al; Institute for Theoretical and Applied; Japan Society for the Promotion of Science; Lomonosov Moscow State University; Russian Foundation for Basic Research","publisher":"Trans Tech Publications Ltd","issn":"16629779","isbn":"9783038354826","language":"English","abbrev_source_title":"Solid State Phenomena","document_type":"Conference Paper","source":"Scopus","bibtex":"@ARTICLE{Ryzhov2015117,\r\nauthor={Ryzhov, V.A. and Khavronin, V.P. and Deriglazov, V.V. and Mukovskii, Y.M. and Chichkov, V.I.},\r\ntitle={Magneto-electronic phase separation in la0.7sr0.3mno3 with metallic behavior in paramagnetic region},\r\njournal={Solid State Phenomena},\r\nyear={2015},\r\nvolume={233-234},\r\npages={117-120},\r\ndoi={10.4028/www.scientific.net/SSP.233-234.117},\r\nnote={cited By 1; Conference of 6th Moscow International Symposium on Magnetism, MISM 2014 ; Conference Date: 29 June 2014 Through 3 July 2014; Conference Code:122919},\r\nurl={https://www.scopus.com/inward/record.uri?eid=2-s2.0-84945198970&doi=10.4028%2fwww.scientific.net%2fSSP.233-234.117&partnerID=40&md5=47477a0e2d5594f1fe5803c3f77614e7},\r\naffiliation={Petersburg Nuclear Physics Institute, NRC ‘Kurchatov Institute’, Gatchina, 188300, Russian Federation; National Research and Technology University, MISiS, Moscow, 119049, Russian Federation},\r\nabstract={The data on transport and magnetic properties (ac linear and nonlinear (second and third orders) susceptibilities) are presented for La0.7Sr0.3MnO3 single crystal with metallic behavior in paramagnetic (PM) region and ferromagnetic (FM) metallic ground state. The FM clusters originate in the PM matrix of the compound below some temperature T* > 425 K, their nonlinear response being weakly T-dependent down to 367 K. This was attributed to clusters arising in the preferable sites formed by chemical inhomogeneities introduced by doping. On cooling below T# ≈ 366 K > TC ≈ 363.3 K, a fast growth of cluster response without the change of its parameters is observed that was attributed to the development of homogeneous nucleation of the FM clusters. The latter stage continues below TC and is accompanied by a crossover to the steeper decreasing of resistivity with cooling that suggests metallic properties of the clusters. The cluster nonlinear response masks completely that of matrix at T = 360.3 K < TC, where it is well described by the model of ensemble of magnetic single-domain nanoparticles in superparamagnetic regime based on the formalism involving Gilbert-Landau-Lifshits equation. Below TD = 359.6 K at the stage of domain formation, a weak interaction of matrix and cluster subsystems leads to their mutual ordering, which is accompanied by a sharp decrease of the nonlinear response to a weak ac field in small steady field H. 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