Electron spin resonance investigation of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi mathvariant="normal">Mn</mml:mi><mml:mrow><mml:mn>2</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:math>ions and their dynamics in Mn-doped<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">Sr</mml:mi><mml:mi mathvariant="normal">Ti</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>3</mml:mn></

Laguta, V. V.; Кондакова, И. В.; Bykov, I. P.; Glinchuk, M. D.; Tkach, Alexander; Vilarinho, Paula M.; Jastrabı́k, L.

doi:10.1103/physrevb.76.054104

Cited by 59 publications

(55 citation statements)

References 27 publications

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“…Specifically, characteristic values of hyperfine splittings and Lande g factors in the corresponding EPR spectra have been very effective in distinguishing between the SrMn, [13]. The EPR spectra of TiMn sample consist of a sextet of lines with a hyperfine splitting of 74 Oe and a Lande g factor of 1.997, and is characteristic of the expected presence of Mn 4+ ions doped at the Ti site [11,12].…”

Section: Mn Doping Inmentioning

confidence: 98%

“…Electron paramagnetic resonance (EPR) has been widely employed to investigate the valences and local environments of the doped Mn ions in the STO lattice [11][12][13]. Specifically, characteristic values of hyperfine splittings and Lande g factors in the corresponding EPR spectra have been very effective in distinguishing between the SrMn, [13].…”

Section: Mn Doping Inmentioning

confidence: 99%

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Site-specific doping, tunable dielectric properties and intrinsic paramagnetism in Mn-doped SrTiO 3

Choudhury

2015

Pramana - J Phys

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Mn doping in SrTiO 3 leads to the emergence of qualitatively distinct and novel physical properties. We show that Mn ions can be controllably doped at either of the perovskite A (Sr) or B (Ti) site as well as at both sites simultaneously and the resultant physical properties depend intimately on the particular dopant site. We critically review the recent literature on various Mn-doped SrTiO 3 systems, which includes reports of dielectric glass, spin-glass and ferromagnetism and by combining experiments with first-principles calculations, we demonstrate that depending on the particular dopant site for Mn ions, the dielectric properties can be widely tuned from a quantum paraelectric to a dielectric glass. However, the intrinsic magnetism in all these cases remains essentially paramagnetic for phase-pure systems.

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Section: Mn Doping Inmentioning

confidence: 98%

Section: Mn Doping Inmentioning

confidence: 99%

Site-specific doping, tunable dielectric properties and intrinsic paramagnetism in Mn-doped SrTiO 3

Choudhury

2015

Pramana - J Phys

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“…Ceramic samples of SMnT were prepared by a mixed oxide technology described elsewhere [27]. Preponderant incorporation of Mn 2+ into A sites of the perovskite structure was confirmed by energy dispersive X-ray spectra [27], electron diffraction and Raman spectroscopy [28], and by Mn 2+ ESR analysis [29]. Fig.…”

Section: Magnetoelectricity In a Multiglass Systemmentioning

confidence: 99%

Magnetoelectricity in multiferroically composed multilayers and multiglasses

Kleemann

Borisov

Shvartsman

et al. 2009

Journal of Magnetism and Magnetic Materials

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“…Strontium titanate is a model material of the perovs kite family [1,2]. It has been found that SrTiO 3 : Mn undergoes dielectric relaxation [3][4][5][6][7], the nature of which still remains unclear [8][9][10]. Kleemann et al [11] established that, in ceramic samples of the stron tium manganese titanate Sr 0.98 Mn 0.02 TiO 3 , the polar glass and spin glass phases coexist and the magneto electric effect manifests itself.…”

Section: Introductionmentioning

confidence: 99%

Ab initio calculations of neutral and charged impurity centers of manganese and chromium in strontium titanate

Kvyatkovskiĭ

2012

Phys. Solid State

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This paper presents the results of ab initio calculations of the equilibrium geometry, the electronic structure, and the spin and charge densities for neutral and negatively charged defects produced by the Mn and Cr impurities in the B position of the SrTiO 3 structure. It has been shown that, in both cases, the neutral defect is an acceptor center, while the singly charged defect is a donor center. It has been found that doubly charged defects are polar, have the symmetry C 4v , and reside in the ionic configurations 5 Mn 3+ + 3 Ti 3+ and 4 Cr 3+ + 3 Ti 3+ , respectively. In each case, there is a pair of almost energy degenerate electronic states ( 4 B 1 and 6 B 1 for Mn and 3 A 1 and 5 A 1 for Cr), which differ only in the direction of the spin of the electron polaron local ized at one of the neighboring titanium atoms. For the manganese impurity, the energy of the polar state 6 B 1 is only 0.174 eV lower than that of the state 6 A 1g (O h ) with the Mn 2+ ion in the high spin state. A new mech anism of dielectric relaxation in STO : Mn has been proposed.

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Electron spin resonance investigation ofMn2+ions and their dynamics in Mn-dopedSrTiO3

Cited by 59 publications

References 27 publications

Site-specific doping, tunable dielectric properties and intrinsic paramagnetism in Mn-doped SrTiO 3

Site-specific doping, tunable dielectric properties and intrinsic paramagnetism in Mn-doped SrTiO 3

Magnetoelectricity in multiferroically composed multilayers and multiglasses

Ab initio calculations of neutral and charged impurity centers of manganese and chromium in strontium titanate

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