Magnetic Properties of a Quantum Ferrimagnet: NiCu(pba)(D2O)3·2D2O

Hagiwara, Masayuki; Minami, Kazuhiko; Narumi, Yasuo; Tatani, K.; Kindo, Koichi

doi:10.1143/jpsj.67.2209

Cited by 82 publications

(49 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Two families of ferrimagnetic chains are described by ACu(pba)(H 2 O) 3 · nH 2 O (pba = 1,3-propylenebis) and ACu(pbaOH)(H 2 O) 3 · nH 2 O (pbaOH = 2-hydroxo-1,3 -propylenebis), where A=Ni, Fe, Co, and Mn [5][6][7]. The cited pioneer studies have stimulated further extensive experimental research on heterometallic and homometallic ferrimagnetic chains [8][9][10][11][12][13]. Another class of ferrimagnetic materials are the so-called topological ferrimagnets.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Spin models of quasi-1D quantum ferrimagnets with competing interactions

Ivanov¹

2009

Condens. Matter Phys.

View full text Add to dashboard Cite

We present a brief survey of the recent theoretical work related to generic Heisenberg spin models describing quasi-one-dimensional quantum ferrimagnets. The emphasis is on quantum chains and ladders with strong competing interactions, such as the frustrated J 1 − J 2 chain with alternating (1, 1/2) spins, the spin-1/2 diamond chain with four-spin cyclic couplings, and some generic types of mixed-spin ladders with geometric frustration. As a rule, the discussed models exhibit rich quantum phase diagrams and provide some interesting examples of one-dimensional magnetic-paramagnetic quantum phase transitions. A number of open problems in the reviewed research area are discussed.

show abstract

Section: Introductionmentioning

confidence: 99%

“…(a) Structure of the quasi-one-dimensional bimetallic compound NiCu(pba)(H2O)3·2H2O with alternating site spins S1 = SNi = 1 and S2 = SCu = 1 2 along the axis b. Hydrogen atoms are omitted for clarity [9]. (b) The classical Néel state of the mixed-spin AFM chain model (1) describing the bimetallic compound NiCu(pba)(H2O)3·2H2O.…”

Section: Introductionmentioning

confidence: 99%

Spin models of quasi-1D quantum ferrimagnets with competing interactions

Ivanov¹

2009

Condens. Matter Phys.

View full text Add to dashboard Cite

show abstract

“…1 that χT shows a relatively significant lowtemperature divergence for S > 2s, while it increases relatively rapidly at intermediate temperatures for S < 2s. Brand-new experiments [25,26] are in progress under the current interest. We hope that the second wave of close collaboration between theoretical and experimental investigations will be brought about.…”

mentioning

confidence: 99%

Magnetic properties of quantum ferrimagnetic spin chains

Yamamoto

1999

Phys. Rev. B

View full text Add to dashboard Cite

Magnetic susceptibilities of spin-(S, s) ferrimagnetic Heisenberg chains are numerically investigated. It is argued how the ferromagnetic and antiferromagnetic features of quantum ferrimagnets are exhibited as functions of (S, s). Spin-(S, s) ferrimagnetic chains behave like combinations of spin-(S − s) ferromagnetic and spin-(2s) antiferromagnetic chains provided S = 2s.PACS numbers: 75.10. Jm, 75.40.Mg, 65.50.+m Quantum behavior of mixed-spin systems is one of the hot topics and a recent progress in the theoretical understanding of it deserves special mention. In contrast with pioneering calculations [1] in the 1980s, the current vigorous argument might more or less be motivated by the Haldane conjecture [2] in that it covers not only ferrimagnetism but also mixed-spin antiferromagnetism. As coexistent spins of different kinds do not necessarily result in magnetic ground states, it remains a stimulative problem there whether the system is massive or massless. Actually various mixed-spin chains [3,4] and ladders [5] with singlet ground states have also been discussed extensively via the nonlinear-σ-model technique with particular emphasis on the competition between massive and massless phases. On the other hand, an arbitrary alignment of alternating spins S and s, which is described by the Hamiltonianshows ferrimagnetism instead of antiferromagnetism and thus has gapless excitations from the ground state. Chemical explorations into ferrimagnetic chain compounds have vigorously been reported so far. In an attempt to obtain bimetallic complexes including onedimensional systems, CuMn(S 2 C 2 O 2 ) 2 (H 2 O) 3 ·4.5H 2 O [6] was first synthesized. Since then numerous bimetallic chain compounds [7] were systematically synthesized and measured. In the series of investigations, the smaller spin s was fixed to 1/2 and the larger spin S was changed from 1/2 to 5/2 featuring several important concepts. One of their main interests was the achievement of a ferromagnetic interaction between nearest-neighbor metal ions, namely, the design of molecular-based ferromagnets. Therefore quantum ferrimagnetism was not necessarily the main subject there. Though there also appeared theoretical investigations [1,8] in close contact with experiments, the argument was restricted to the spin combinations (S, 1/2) and the larger spin S was sometimes treated as classical.In such circumstances, several renewed interests [9][10][11][12][13][14][15][16][17][18][19], have recently been introduced into the field. Alcaraz and Malvezzi [9] predicted the universal low-energy physics of anisotropic ferrimagnetic chains and the distinct behavior of isotropic ones. Kuramoto [16] discussed critical properties of the model in a field showing its magnetization curve with a plateau. Maisinger et al. [19] revealed the field-induced double-peak structure of the specific heat. Another noteworthy subject, which is the main interest here, is the coexistence of the ferromagnetic and antiferromagnetic features in quantum ferrimagnets. The author et al. pointe...

show abstract

“…Ferrimagnets are believed to have a combined effect of both behaviors [4,8,9,17,21,18], ferromagnetic and antiferromagnetic. Susceptibility times temperature decreases at low temperature showing a minimum and them starts to increase showing that the antiferromagnetic behavior is not smeared out after the minimum.…”

Section: Total Magnetization Decreases With Increasing T and mentioning

confidence: 99%