Kristallographische, elektronische und magnetische Eigenschaften des Spinells Li[Mn2]O4

Schutte, L.M.; Colsmann, G.; Reuter, B.

doi:10.1016/0022-4596(79)90161-0

Cited by 56 publications

(14 citation statements)

References 8 publications

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“…Really, the calculated magnetic moments (m ) per Mn ion, as deduced from the sample compositions and assuming m "4.90 and 3.87 for Mn> and Mn>, respectively, well cover the experimental range (see Table 3). The data also agree with a recent study (7), differently from the data of Schutte et al calling for the coexistence of high and low spin Mn> configurations (21).…”

Section: Discussioncontrasting

confidence: 56%

Electric and Magnetic Properties of LiMn2O4- and Li2MnO3-Type Oxides

Massarotti

Capsoni

Bini

et al. 1997

Journal of Solid State Chemistry

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Section: Discussioncontrasting

confidence: 56%

Electric and Magnetic Properties of LiMn2O4- and Li2MnO3-Type Oxides

Massarotti

Capsoni

Bini

et al. 1997

Journal of Solid State Chemistry

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“…An empirical measure of frustration in spin glasses is the ratio f ϭ͉⌰͉/T f . 32 From literature data 1,[6][7][8][9][10][11][12][13][14][15] and this study, a higher value of f is calculated for LiMn 2 O 4 ( f ϭ10-14) than for -MnO 2 ( f ϭ5 -6).…”

Section: Resultsmentioning

confidence: 62%

“…6 In the paramagnetic temperature regime, antiferromagnetic interactions predominate in Li x Mn 2 O 4 (xϭ0,1,2). [6][7][8][9][10][11][12][13][14][15][16] In -MnO 2 and LiMn 2 O 4 , Greedan et al 14 and Wills et al 15 have obtained evidence for long-range antiferromagnetic ordering, resulting in magnetic unit cells containing 128 and 1152 spins below 32 and 65 K, respectively. 14,15 At the other concentration limit, Li 2 Mn 2 O 4 , Wills et al 16 reported twodimensional short-range antiferromagnetic correlation, but no long-range ordering.…”

Section: Introductionmentioning

confidence: 99%

Magnetic characterization of λ-MnO2 and Li2Mn2O4 prepared by electrochemical cycling of LiMn2O4

Jang

Huang

Chou

et al. 2000

Journal of Applied Physics

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Articles you may be interested inGlassy magnetic ground state in La 4 / 3 Sr 5 / 3 Mn 2 O 7 : Role of first order phase transition and short range antiferromagnetic correlations J. Appl. Phys. 112, 083915 (2012); 10.1063/1.4759348 Electrochemical behavior of LiNi1−y−zCoyMnzO2 probed through structural and magnetic properties J. Appl. Phys. 111, 023904 (2012); 10.1063/1.3676434 Size-driven magnetic transitions in monodisperse MnO nanocrystals J. Appl. Phys. 107, 09E124 (2010); 10.1063/1.3366611 Cluster-spin-glass behavior in layered LiNi 0.4 Mn 0.4 Co 0.2 O 2 Magnetic characterization has been performed on the cubic phases -Li 0.07 Mn 2 O 4 , Li 0.98 Mn 2 O 4 , and the tetragonal phase Li 1.82 Mn 2 O 4 , prepared by electrochemical cycling of a single starting LiMn 2 O 4 spinel. The magnitude of the negative Weiss constant increases with x in Li x Mn 2 O 4 , indicating that antiferromagnetic interactions increase in strength as the Mn 4ϩ concentration decreases. Spin-glass behavior is observed in all three materials, as previously seen in nearly stoichiometric LiMn 2 O 4 ͓Jang et al., Appl. Phys. Lett. 74, 2504 ͑1999͔͒.A short-range antiferromagnetic correlation is observed in Li 2 Mn 2 O 4 at temperatures below the paramagnetic temperature regime, which is ascribed to collective Jahn-Teller distortion causing a two-dimensional nearest-Mn-neighbors interaction.

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“…Assum-ing hole localization on Mn> ions, the resulting Mn> ions should be surrounded by nearly regular oxygen octahedra as for Mn>: the superexchange interactions between nearest neighbor Mn ions would take place only for 90°bond angles, since the tetrahedral sites are occupied by Li> ions. However, part of the Mn> ions may be in low spin configuration (23) or replaced by Li>, making a simple prediction about exchange interactions unreliable. No recent information is available about the magnetic transition of the spinel phase, although magnetic susceptibility measurements (23) suggest antiferromagnetic behavior for ¹(100 K. Moreover, double exchange phenomena due to electron hopping should not be excluded in cases of crystallographic equivalence of the Mn> and Mn> sites (24).…”

Section: Discussionmentioning

confidence: 99%