Magnetic properties of TM3[Cr(CN)6]2·n H2O

Zentková, M.; Mihalik, M.; Kováč, J.; Zentko, A.; Mitróová, Z.; Lukáčová, M.; Kavečanský, V.; Kiss, L. F.

doi:10.1002/pssb.200562463

Cited by 10 publications

(14 citation statements)

References 14 publications

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“…3 (e g ) 1 leading to 3 F and 9 AF pathways, or the second possibility when Cr 2+ is low spin S = 1 and magnetic orbitals are (t 2g ) 2 leading to 6 AF pathways [4]. In the case that all Cr 2+ are high spin, the expected theoretical value …”

Section: Resultsmentioning

confidence: 95%

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Effect of Pressure on Magnetic Properties of Hexacyanochromates

et al. 2008

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We present the study of pressure effect on magnetic properties of TM 2+ 3 [Cr III (CN) 6 ] 2 · nH 2 O ferrimagnets and ferromagnets (TM = Cr and Co) under pressures up to 0.9 GPa. Applied pressure strengthens super--exchange interaction in Cr 2+ -prussian blue analogues with dominant antiferromagnetic interaction JAF leading to increase in the Curie temperature TC (∆T c /∆p = 29.0 K/GPa) and reduces T C of Co 2+ -prussian blue analogues with dominant ferromagnetic interaction JF (∆Tc/∆p = −1.8 K/GPa). The rise of J AF interaction is attributed to the enhanced value of the single electron overlapping integral S. On the other hand, the applied pressure slightly affects bonding angles between magnetic ions mediated by the cyano-bridge and reduces the strength of magnetic coupling. Changes of the magnetization curve with pressure can be attributed to changes of magnetic anisotropy. The reduction of magnetization with pressure observed on Cr 2+ -prussian blue analogues can be explained by pressure induced transition from Cr 2+ high spin state to Cr 2+ low spin state. All pressure induced changes are reversible.

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Section: Resultsmentioning

confidence: 95%

“…3 (e g ) 1 and low spin S = 1 with magnetic orbitals (t 2g ) 2 as well [4]. In our recent paper [5] we presented results of the pressure effect on magnetic properties of TM …”

Section: Introductionmentioning

confidence: 92%

Effect of Pressure on Magnetic Properties of Hexacyanochromates

et al. 2008

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“…The magnetic coupling in these systems is determined by super-exchange interaction between metal ions A 2+ and B III mediated through a three-dimensional network of C¨CN bridges, resulting in 3D magnetic ordering with transition temperatures T C up to 376 K [2] depending on the nature of the metal ions. The magnetic properties of PBA can be analysed within two simplifications: (i) only the superexchange interactions between the nearest neighbour metal A 2+ and B III ions have to be considered; (ii) if the magnetic orbital symmetries of the metal ions are the same, the super-exchange interaction is antiferromagnetic (J AF ); conversely, when their magnetic orbital symmetries are different, the super-exchange interaction is ferromagnetic (J F 3 (e g ) 2 orbitals of Mn 2+ leading to overall J AF interaction. The large number of possible combinations of ions and oxidation states give rise to many competing orbital interactions, which will cause the structure to reach an overall order, either fero or ferimagnetic.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Pressure on Magnetic Properties of KMnCr(CN)₆.

Vávra

Hrabčák

Zentková

et al. 2013

EPJ Web of Conferences

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In the contribution we present the effect of pressure on magnetic properties of molecule based magnet KMnCr(CN) 6 . Applied pressure affects magnetization curves only marginally. The saturation is reached at higher magnetic fields under pressure, but the effect of the pressure on the values of saturated magnetization µ s , remnant magnetization µ r and coercive field H C are almost negligible. Observed pronounced increase of the Curie temperature T C with increasing pressure can be attributed to strengthening of antiferromagnetic superexchange interaction. Additionally we observed double magnetic transition induced by hydrostatic pressure. All pressure changes were fully reversible.

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“…Later in paper [5] −N ≡ C−B III ) ions have to be considered; (ii) if the magnetic orbital symmetries of the metal ions are the same, the superexchange interaction is antiferromagnetic (J AF ); conversely, when their magnetic orbital symmetries are different, the super-exchange interaction is ferromagnetic (J F ). The cluster glass behaviour is frequently observed in this system [6,7]. The results of the pressure effect on magnetic properties of the mother PBA were recently published in [8].…”

Section: Introductionmentioning

confidence: 88%

Effect of Pressure on Magnetic Properties of TM₃[Cr(CN)₆]₂·nH₂O Nanoparticles

et al. 2008

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Effect of pressure on magnetic properties of magnetic nanoparticles, based on Prussian blue analogues, were studied in pressures up to 1.2 GPa. The Mn 3 [Cr(CN) 6 ] 2 · nH 2 O and Ni 3 [Cr(CN) 6 ] 2 · nH 2 O nanoparticles were prepared by reverse micelle technique. Transmission electron microscopy images show nanoparticles with average diameter of about 3.5 nm embedded in an organic matrix. The characteristic X-ray peaks of nanoparticles are more diffused and broader. Systems of nanoparticles behave as systems of interacting magnetic particles. The Curie temperature TC is reduced from T C = 56 K for Ni-Prussian blue analogues to T C = 21 K for Ni-nanoparticles system and from TC = 65 K for Mn-Prussian blue analogues to T C = 38 K for Mn-nanoparticles system. One can explain this reduction of the Curie temperature and of the saturated magnetization µs by dispersion of nanoparticles in an organic matrix i.e. by a dilution effect. Applied pressure leads to a remarkable increase in T C for system of Mn-nanoparticles (∆T C /∆p = +13 K/GPa) and to only slight decrease in T C for system of Ni-nanoparticles (∆T C /∆p = −3 K/GPa). The pressure effect follows behavior of the mother Prussian blue analogues under pressure. The increase in saturated magnetization, attributed to compression of the organic matrix, is very small.

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Magnetic properties of TM₃[Cr(CN)₆]₂·n H₂O

Cited by 10 publications

References 14 publications

Effect of Pressure on Magnetic Properties of Hexacyanochromates

Effect of Pressure on Magnetic Properties of Hexacyanochromates

The Effect of Pressure on Magnetic Properties of KMnCr(CN)₆.

Effect of Pressure on Magnetic Properties of TM₃[Cr(CN)₆]₂·nH₂O Nanoparticles

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Magnetic properties of TM3[Cr(CN)6]2·n H2O

Cited by 10 publications

References 14 publications

Effect of Pressure on Magnetic Properties of Hexacyanochromates

Effect of Pressure on Magnetic Properties of Hexacyanochromates

The Effect of Pressure on Magnetic Properties of KMnCr(CN)6.

Effect of Pressure on Magnetic Properties of TM3[Cr(CN)6]2·nH2O Nanoparticles

Contact Info

Product

Resources

About

Magnetic properties of TM₃[Cr(CN)₆]₂·n H₂O

The Effect of Pressure on Magnetic Properties of KMnCr(CN)₆.

Effect of Pressure on Magnetic Properties of TM₃[Cr(CN)₆]₂·nH₂O Nanoparticles