[Ni(Prixa)2 (pyr)]n -: Low-dimensional S=1 Heisenberg magnet

被引：2

作者：

Orendácová, A ^{[1
]}

Zorkovská, A ^{[1
]}

Park, JH ^{[1
]}

Orendác, M ^{[1
]}

Trávnícek, Z ^{[1
]}

Feher, A ^{[1
]}

Meisel, MW ^{[1
]}

机构：

[1] Safarik Univ, Fac Sci, Inst Phys, Ctr Low Temp Phys, Kosice 04154, Slovakia

来源：

PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 3, NO1 | 2006年 / 3卷 / 01期

关键词：

D O I：

10.1002/pssc.200562512

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

[Ni(Pr(i)xa)(2)(pyr)](n) was previously identified as a S = 1 Heisenberg chain with intrachain interaction J/k(B) congruent to -2.7 K and subcritical single-ion anisotropy D. Specific heat measurements conducted from 100 mK to 9 K in zero magnetic field revealed the presence of a X-like anomaly at T-c = 2.2 K, which can be associated with a phase transition to the ordered state. Magnetic entropy removed above T, indicates a low-dimensional character of the magnetic system. Observed deviations between the specific heat data and predictions from a S = I Heisenberg chain model with various D/J ratios can be ascribed to the presence of additional exchange coupling mediated by a set of hydrogen bonds. These interactions together with the intrachain coupling potentially form a two-dimensional distorted triangular S = 1 Heisenberg lattice which might approximate magnetic behaviour above T-c.

引用

页码：134 / 137

页数：4

共 10 条

[1] Collinear Neel-type ordering in partially frustrated lattices [J].

Bhaumik, U ;

Bose, I .

PHYSICAL REVIEW B, 1998, 58 (01) :73-76

[2] SPECIFIC-HEAT OF MAGNETIC LINEAR-CHAINS [J].

BLOTE, HWJ .

PHYSICA B & C, 1975, 79 (05) :427-466

[3] Quantum Monte Carlo study of S=1/2 weakly anisotropic antiferromagnets on the square lattice -: art. no. 104414 [J].

Cuccoli, A ;

Roscilde, T ;

Tognetti, V ;

Vaia, R ;

Verrucchi, P .

PHYSICAL REVIEW B, 2003, 67 (10) :18

[4] THE MAGNETIC AND CALORIC BEHAVIOUR OF COPPER POTASSIUM SULPHATE AT TEMPERATURES BELOW 1-DEGREE-K [J].

DEKLERK, D .

PHYSICA, 1946, 12 (08) :513-533

[5] PREROUGHENING TRANSITIONS IN CRYSTAL-SURFACES AND VALENCE-BOND PHASES IN QUANTUM SPIN CHAINS [J].

DENNIJS, M ;

ROMMELSE, K .

PHYSICAL REVIEW B, 1989, 40 (07) :4709-4734

[6] The Heisenberg antiferromagnet on an anisotropic triangular lattice: linear spin-wave theory [J].

Merino, J ;

McKenzie, RH ;

Marston, JB ;

Chung, CH .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1999, 11 (14) :2965-2975

[7] Muon spin relaxation study of the magnetic transition in a two-dimensional distorted triangular lattice β′-(CH3)4P[Pd(dmit)2]2 -: art. no. 220404 [J].

Ohira, S ;

Tamura, M ;

Kato, R ;

Watanabe, I ;

Iwasaki, M .

PHYSICAL REVIEW B, 2004, 70 (22) :220404-1

[8] Magnetic studies of the S=1 Heisenberg chain [Ni(Prixa)2(pyr)]n [J].

Orendácová, A ;

Orendác, M ;

Trávnícek, Z ;

Meisel, MW .

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH, 2003, 196 (01) :278-281

[9] Antiferromagnetic Heisenberg model on an anisotropic triangular lattice in the presence of a magnetic field [J].

Shen, SQ ;

Zhang, FC .

PHYSICAL REVIEW B, 2002, 66 (17) :1-4

[10] Reactions of bis(isopropylxanthato)nickel(II) with nitrogen or oxygen donor ligands .3. X-ray crystal structure of the complex with pyrazine [J].

Travnicek, Z ;

Pastorek, R ;

Sindelar, Z ;

Kamenicek, J ;

Marek, J .

POLYHEDRON, 1996, 15 (18) :2975-2981

← 1 →