High-Field Magnetization and Neutron Diffraction Studies of One-Dimensional Compound Ca<sub>3</sub>CoRhO<sub>6</sub>

Niitaka, Seiji; Kageyama, Hiroshi; Yoshimura, Kazuyoshi; Koyamada, Koji; Kawano, Seiji; Aso, Naofumi; Mitsuda, Akihiro; Mitamura, Hiroyuki; Goto, T.

doi:10.1143/jpsj.70.1222

Cited by 50 publications

(72 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The magnetism of these compounds can be characterized by two temperatures: (1) below T 1 a complex antiferromagnetic order appears and magnetic phase transitions in applied field lead to a nonlinear evolution of the magnetization; (2) below T 2 < T 1 a spin-freezing state was proposed. Note that for Ca 3 CoIrO 6 only a spin-freezing temperature T 2 was reported. 10 For Ca 3 3 CoRhO 6 magnetic Bragg reflections were observed by neutron powder diffraction below T 1 .…”

Section: Among Numerous Isostructural Phases Withmentioning

confidence: 99%

“…Note that for Ca 3 CoIrO 6 only a spin-freezing temperature T 2 was reported. 10 For Ca 3 3 CoRhO 6 magnetic Bragg reflections were observed by neutron powder diffraction below T 1 . 3,4 At temperatures down to T 2 , a PDA state was inferred.…”

Section: Among Numerous Isostructural Phases Withmentioning

confidence: 99%

“…10 For Ca 3 3 CoRhO 6 magnetic Bragg reflections were observed by neutron powder diffraction below T 1 . 3,4 At temperatures down to T 2 , a PDA state was inferred. In the magnetic phase 2/3 of the ferromagnetic chains are coupled antiferromagnetically while the other 1/3 of the chains stays disordered, with a spin orientation along the c axis either in "positive" or "negative" direction.…”

Section: Among Numerous Isostructural Phases Withmentioning

confidence: 99%

See 2 more Smart Citations

Magnetic properties and crystal structure of Sr3CoIrO6and Sr3NiIrO
Mikhailova
¹
,
Schwarz
²
,
Senyshyn
³

et al. 2012
Phys. Rev. B

View full text Add to dashboard Cite

We have studied the magnetic properties and crystal structure of Sr 3 CoIrO 6 and Sr 3 NiIrO 6 as a function of temperature. Two characteristic temperatures, T 1 = 90 K and T 2 = 25 K for Sr 3 CoIrO 6 , and T 1 = 85 K and T 2 = 15 K for Sr 3 NiIrO 6 , were observed. Below T 1 a significant increase of magnetization and below T 2 a weak temperature dependence of magnetization in the field-cooled and practically zero magnetization values in the zero-field-cooled mode were detected for both compounds. The existence of Ir 4+ in Sr 3 CoIrO 6 was confirmed by an Ir-L III x-ray absorption measurement. Magnetoelastic effects have been observed in the temperature dependence of the lattice parameters of Sr 3 CoIrO 6 and Sr 3 NiIrO 6 . The magnetic structure of Sr 3 CoIrO 6 in zero fields can be described as a commensurate modulated antiferromagnet with a propagation vector k = (0,0,1). Neutron powder diffraction with polarized neutrons gave evidence of short-range magnetic order, above and below the magnetic ordering temperature.

show abstract

Section: Among Numerous Isostructural Phases Withmentioning

confidence: 99%

Section: Among Numerous Isostructural Phases Withmentioning

confidence: 99%

Section: Among Numerous Isostructural Phases Withmentioning

confidence: 99%

See 1 more Smart Citation

Magnetic properties and crystal structure of Sr3CoIrO6and Sr3NiIrO
Mikhailova
¹
,
Schwarz
²
,
Senyshyn
³

et al. 2012
Phys. Rev. B

View full text Add to dashboard Cite

show abstract

“…The plateau at one third of saturation magnetization (M s ) characterizing PDA state (e.g., 62 K) [5] observed for A is diminished for B with a weak increase of the slope of the curve near 50 kOe. However, this plateau is completely absent for C and M increases gradually with H without any evidence for saturation.…”

Section: Resultsmentioning

confidence: 99%

“…It has been proposed [4] that this compound can be an example for non-equilibrium one-dimensional Ising model. There was a controversy [5,9] surrounding valence and spin states of Co (occupying distorted trigonal prismatic coordination site) and Rh (occupying distorted octahedral site). It is now established [11, 13, and 14] that Co is in the divalent, high-spin d 7 spin configuration, and Rh is in the tetravalent, low-spin d 5 configuration.…”

Section: Introductionmentioning

confidence: 99%

Magnetic anomalies in nanocrystalline , a geometrically frustrated spin-chain compound

Mohapatra

Iyer

Chalke

et al. 2009

Solid State Communications

View full text Add to dashboard Cite

We have investigated the magnetic behavior of the nano crystals, synthesized by highenergy ball-milling, for a well-known geometrically frustrated spin-chain system, Ca 3 CoRhO 6 , and compared its magnetic characteristics with those of the bulk form by measuring ac and dc magnetization. The features attributable to the onset of 'partially disordered antiferromagnetism' (characterizing the bulk form) are not seen in the magnetization data of the nano particles; the magnetic moment at high fields in the very low temperature range in the magnetically ordered state gets relatively enhanced in the nano particles. It appears that the ferromagnetic intrachain interaction, judged by the sign of paramagnetic Curie temperature, is preserved in the nano particles. These trends are opposite to those seen in the nano particles of Ca 3 Co 2 O 6 . However, the complex spindynamics as evidenced by large frequency dependence of ac susceptibility is retained in the nano particles as well. Thus, there are some similarities and dissimilarities between the properties of the nano particles and those of the bulk. We believe that these findings would be useful to understand correlation lengths deciding various properties of geometrical frustration and/or spin-chain phenomena. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17]. This compound exhibits one magnetic transition near (T 1 =) 90 K and the other near (T 2 =) 30 K. On the basis of neutron diffraction studies [4], it was inferred that, in the temperature (T) range between T 1 and T 2 , partially disordered antiferromagnetism (PDA) occurs in which two out of three ferromagnetic chains are antiferromagnetically coupled while the third one does not order magnetically; at T 2 , the incoherent chain freezes with a yet-to-be understood complex spin-dynamics as evidenced [6] by a huge frequency dependence of ac susceptibility (χ). It has been proposed [4] that this compound can be an example for non-equilibrium one-dimensional Ising model. There was a controversy [5,9] surrounding valence and spin states of Co (occupying distorted trigonal prismatic coordination site) and Rh (occupying distorted octahedral site). It is now established [11, 13, and 14] that Co is in the divalent, high-spin d 7 spin configuration, and Rh is in the tetravalent, low-spin d 5 configuration. Thus, the metallic ions at both these sites are magnetic. While this situation is different from that of Ca 3 Co 2 O 6 (in which Co at both the sites are trivalent with one site being non-magnetic), the properties of both the compounds are similar in many ways [8]. Interestingly, a giant orbital moment has been found [13,14] in the compound under investigation. This compound is also characterized by large thermoelectric power, offering a new route for the search for thermoelectric materials [7]. The magnetic properties of this compound have been found to be insensitive to applications of positive and negative pressure [16], though a small disturbance of Ca site appears to disfavor PDA formation. Recently, i...

show abstract

Polaronic charge transfer and large dielectric constant inCa₃CoRhO₆

Banerjee

Sannigrahi

Giri

et al. 2016

Phys. Status Solidi B

View full text Add to dashboard Cite

We report the dc electrical conductivity and ac impedance study of the spin chain compound Ca3CoRhO6. The sample shows a variable range hopping‐assisted dc conduction below 250 K, while a nearest neighbor small polaron hopping is observed at higher temperatures. A reasonably large frequency‐independent ac dielectric permittivity (∼3200) is observed around room temperature. The activation energy associated with the relaxation peaks in loss tangent below 200 K is found to be close to the variable range hopping energy of the dc resistivity data which signifies the active role of the charge carrier hopping toward the ac dielectric data. The characteristic time constant associated with the relaxation (7.2 × 10−11 s) and the value of activation energy (116 meV) suggest a polaronic charge transfer in the system. The modulus analysis suggests that the relaxation in permittivity is due to the intrinsic grain effect and it is likely to be associated with charge transfer between transition metal ions in a system where their mixed valence nature is already reported. The sample also shows dielectric anomaly close to the low‐temperature magnetic transition, although we failed to observe any ground state spontaneous electric polarization.

show abstract

High-Field Magnetization and Neutron Diffraction Studies of One-Dimensional Compound Ca₃CoRhO₆

Cited by 50 publications

References 8 publications

Magnetic properties and crystal structure of Sr3CoIrO6and Sr3NiIrO
Mikhailova
¹
,
Schwarz
²
,
Senyshyn
³

et al. 2012
Phys. Rev. B

Magnetic properties and crystal structure of Sr3CoIrO6and Sr3NiIrO
Mikhailova
¹
,
Schwarz
²
,
Senyshyn
³

et al. 2012
Phys. Rev. B

Magnetic anomalies in nanocrystalline , a geometrically frustrated spin-chain compound

Polaronic charge transfer and large dielectric constant inCa₃CoRhO₆

Contact Info

Product

Resources

About

High-Field Magnetization and Neutron Diffraction Studies of One-Dimensional Compound Ca3CoRhO6

Cited by 50 publications

References 8 publications

Magnetic properties and crystal structure of Sr3CoIrO6and Sr3NiIrOMikhailova1, Schwarz2, Senyshyn3 et al. 2012Phys. Rev. B

Magnetic properties and crystal structure of Sr3CoIrO6and Sr3NiIrOMikhailova1, Schwarz2, Senyshyn3 et al. 2012Phys. Rev. B

Magnetic anomalies in nanocrystalline , a geometrically frustrated spin-chain compound

Polaronic charge transfer and large dielectric constant inCa3CoRhO6

Contact Info

Product

Resources

About

High-Field Magnetization and Neutron Diffraction Studies of One-Dimensional Compound Ca₃CoRhO₆

Magnetic properties and crystal structure of Sr3CoIrO6and Sr3NiIrO
Mikhailova
¹
,
Schwarz
²
,
Senyshyn
³

et al. 2012
Phys. Rev. B

Magnetic properties and crystal structure of Sr3CoIrO6and Sr3NiIrO
Mikhailova
¹
,
Schwarz
²
,
Senyshyn
³

et al. 2012
Phys. Rev. B

Polaronic charge transfer and large dielectric constant inCa₃CoRhO₆