Magnetic Moment Measurements on Caesium and Rubidium Manganese Chloride

Hoel, L A

doi:10.1002/pssb.19690360111

Cited by 13 publications

(6 citation statements)

References 8 publications

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“…The crystals with the ions Mn 2+ , Ca 2+ [5]-make the second class with triclinic symmetry and the space group P 1, Z = 1. It should be noted that thanks to the presence of the paramagnetic Me 2+ ions, the crystals from both classes show a ferromagnetic or antiferromagnetic ordering in the cryogenic temperature range [6][7][8][9][10][11]. Moreover, the crystals with triclinic symmetry have domain structure at room temperature [5].…”

Section: Introductionmentioning

confidence: 99%

Various ferroic orderings of triclinic tetrachloro-metallate dihydrate crystals

Tylczyñski¹,

Członkowska²,

Laniecki³

2009

J. Phys.: Condens. Matter

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In the triclinic crystals Rb(2)MnCl(4)·2H(2)O, Cs(2)MnCl(4)·2H(2)O and Cs(2)CaCl(4)·2H(2)O the ferroelastic domain structure has been observed for temperatures from 100 K to the dehydration point. On heating at a few degrees before the dehydration point the structure has been found to reorganize. On heating in Rb(2)MnCl(4)·2H(2)O and Cs(2)MnCl(4)·2H(2)O (but not in Cs(2)CaCl(4)·2H(2)O) a dielectric anomaly typical of a weak ferroelectric phase transition has been noted. The low-frequency dielectric dispersion in the low-temperature phase is attributed to the oscillations of the domain walls. The activation energy of this motion is 73 and 67 kJ mol(-1) in Rb(2)MnCl(4)·2H(2)O and Cs(2)MnCl(4)·2H(2)O, respectively. In the phase transition region the complex permittivity has been found to show oscillations as a function of temperature.

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Section: Introductionmentioning

confidence: 99%

Various ferroic orderings of triclinic tetrachloro-metallate dihydrate crystals

Tylczyñski¹,

Członkowska²,

Laniecki³

2009

J. Phys.: Condens. Matter

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“…Rb,MnBr4.2H,0 is a compound in the series A,MnX,.2Hz0, (A: Cs and Rb, X: C1 and Br) of hydrated salts which exhibits antiferromagnetism at low temperatures [l, 2,3]. RbzMnBr4 .2H,O crystallizes in a triclinic structure with space group P i and with one magnetic ion per unit cell [4]. The Mne+ ion has a ?SS,, ground state with an isotropic g-factor g = 2 [4].…”

Section: Introductionmentioning

confidence: 99%

“…RbzMnBr4 .2H,O crystallizes in a triclinic structure with space group P i and with one magnetic ion per unit cell [4]. The Mne+ ion has a ?SS,, ground state with an isotropic g-factor g = 2 [4]. The compound RbzMnBr4.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Phase Diagram of Rb₂MnBr₄·2H₂O

Carrander

1973

Phys. Scr.

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“…Hitherto there have been no information on phase transitions in this group of crystals, they have been reported to show domain structure [7], although the nature of the domains has not been described. The crystals of both groups having a paramagnetic ion Me 2+ in the cryogenic temperature range show ferromagnetic or antiferromagnetic ordering [9,10,11]. …”

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confidence: 98%

Ferroelectric and ferroelastic properties of Rb2MnCl4·2H2O

Członkowska¹,

Tylczyñski

Laniecki

2006

Cryst. Res. Technol.

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Rb 2 MnCl 4 ·2H 2 O crystal belonging to the family of tetrahalogeno-metallates dihydrates has been subjected to thermal, optical and dielectric studies. At room temperature the optical study under a polarization microscope has revealed a ferroelastic domain structure. At 240 K a dielectric anomaly, characteristic of the week ferroelectric phase transition, has been also observed. Moreover, below the temperatures of the phase transitions dielectric dispersion has appeared. Ferroic properties of Rb 2 MnCl 4 ·2H 2 O crystal have been compared to those of other tetrachlorides dehydrates.The crystals of dihydrate tetrahalogeno metallates of the general formula A 2 BY 4 ·2H 2 O (where A = NH 4 , K, Rb, Cs; B = Cu, Mn, Ca, Ni; Y = Cl, Br) can be divided into two groups according to their symmetry and structure. The first group includes the crystals having at room temperature the tetragonal symmetry with a space group 4 2 /mnm, Z = 2. Their structure is made of water-halogen octahedrons surrounding a divalent ion. The chlorine or bromine ions make a rhomb in the a-a plane. The tetrahedrons surrounding the divalent metal ions placed at the corners of the unit cell are rotated exactly by 90° with respect to the tetrahedron surrounding the ion at the centre of the cell. O undergoes a structural phase transition at T C = 201 K accompanied by a change in point symmetry from 4/mmm to 42m [5,6], the low-temperature phase shows ferroelastoelectric ordering. In the crystal (NH 4 ) 2 MnCl 4 ·2H 2 O the change from the tetragonal to orthorhombic symmetry occurs through the intermediate phase in the range 266 -271 K [4]. In the other crystals of this group no structural phase transitions were observed. The second group includes the crystals with the ions Mn 2+, Ca 2+ and Ni 2+ . At room temperature they have the triclinic symmetry with the space group P1, Z = 1 [7,8]. They are built also of waterhalogen octahedrons but the chlorine/ bromine ions make a square in the a-b plane, and the positions of all the octahedrons are equivalent. Hitherto there have been no information on phase transitions in this group of crystals, they have been reported to show domain structure [7], although the nature of the domains has not been described. The crystals of both groups having a paramagnetic ion Me 2+ in the cryogenic temperature range show ferromagnetic or antiferromagnetic ordering [9,10,11].

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Magnetic Moment Measurements on Caesium and Rubidium Manganese Chloride

Cited by 13 publications

References 8 publications

Various ferroic orderings of triclinic tetrachloro-metallate dihydrate crystals

Various ferroic orderings of triclinic tetrachloro-metallate dihydrate crystals

Magnetic Phase Diagram of Rb₂MnBr₄·2H₂O

Ferroelectric and ferroelastic properties of Rb2MnCl4·2H2O

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Magnetic Moment Measurements on Caesium and Rubidium Manganese Chloride

Cited by 13 publications

References 8 publications

Various ferroic orderings of triclinic tetrachloro-metallate dihydrate crystals

Various ferroic orderings of triclinic tetrachloro-metallate dihydrate crystals

Magnetic Phase Diagram of Rb2MnBr4·2H2O

Ferroelectric and ferroelastic properties of Rb2MnCl4·2H2O

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Magnetic Phase Diagram of Rb₂MnBr₄·2H₂O