scholarly journals Spin Gap at the Phase Transition between Spin Liquid and Long-Range Ordered State in La1-xSrxCuO2.5.

1998 ◽  
Vol 7 ◽  
pp. 571-573 ◽  
Author(s):  
S. Sugai ◽  
T. Shinoda ◽  
N. Kobayashi ◽  
Z. Hiroi ◽  
M. Takano
Keyword(s):  
Phase Transition ◽  
Long Range ◽  
Spin Liquid ◽  
Spin Gap ◽  
Ordered State

scholarly journals Quasi-1D XY antiferromagnet Sr2Ni(SeO3)2Cl2 at Sakai-Takahashi phase diagram

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
E. S. Kozlyakova ◽  
A. V. Moskin ◽  
P. S. Berdonosov ◽  
V. V. Gapontsev ◽  
S. V. Streltsov ◽  
...  
Keyword(s):  
Phase Diagram ◽  
Long Range ◽  
Density Functional ◽  
Uniaxial Anisotropy ◽  
Exchange Interactions ◽  
Spin Liquid ◽  
Functional Theory ◽  
One Dimensional ◽  
Ordered Phases ◽  
Experimental Findings

AbstractUniform quasi-one-dimensional integer spin compounds are of interest as a potential realization of the Haldane conjecture of a gapped spin liquid. This phase, however, has to compete with magnetic anisotropy and long-range ordered phases, the implementation of which depends on the ratio of interchain J′ and intrachain J exchange interactions and both uniaxial D and rhombic E single-ion anisotropies. Strontium nickel selenite chloride, Sr2Ni(SeO3)2Cl2, is a spin-1 chain system which passes through a correlations regime at Tmax ~ 12 K to long-range order at TN = 6 K. Under external magnetic field it experiences the sequence of spin-flop at Bc1 = 9.0 T and spin-flip transitions Bc2 = 23.7 T prior to full saturation at Bsat = 31.0 T. Density functional theory provides values of the main exchange interactions and uniaxial anisotropy which corroborate the experimental findings. The values of J′/J = 0.083 and D/J = 0.357 place this compound into a hitherto unoccupied sector of the Sakai-Takahashi phase diagram.

scholarly journals μSR-detected soft mode toward a possible phase transition in a disordered spin-gap system, (CH3)2CHNH3–Cu(ClxBr1−x)3

2009 ◽  
Vol 404 (5-7) ◽  
pp. 594-596
Author(s):  
T. Goto ◽  
T. Suzuki ◽  
I. Watanabe ◽  
K. Kanada ◽  
T. Saito ◽  
...  
Keyword(s):  
Phase Transition ◽  
Soft Mode ◽  
Spin Gap

Finding of Bulk Ferromagnetism in Stable Organic Radical Crystal

1992 ◽  
Vol 247 ◽  
Author(s):  
Minoru Kinoshita
Keyword(s):  
Crystal Structure ◽  
Long Range ◽  
Molecular And Crystal Structure ◽  
Organic Radical ◽  
Light Elements ◽  
Nitronyl Nitroxide ◽  
Β Phase ◽  
Phase Crystal ◽  
Iupac Nomenclature ◽  
Ordered State

ABSTRACTTransition to a ferromagnetic long range ordered state was found at 0.60 K in the orthorhombic β-phase crystal of p-nitrophenyl nitronyl nitroxide (or 2-(4′-nitrophenyl)-4, 4, 5, 5-tetramethyl-4, 5-dihydro-lH-imidazol-1-oxyl-3-N-oxide in the IUPAC nomenclature). This finding provides the first example of an organic bulk ferromagnet consisting of light elements and having a definite molecular and crystal structure.

scholarly journals Existence of a Phase Transition under Finite Magnetic Field in the Long-Range RKKY Ising Spin Glass DyxY1-xRu2Si2

2010 ◽  
Vol 79 (12) ◽  
pp. 123704 ◽  
Author(s):  
Yoshikazu Tabata ◽  
Kousuke Matsuda ◽  
Satoshi Kanada ◽  
Teruo Yamazaki ◽  
Takeshi Waki ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Spin Glass ◽  
Long Range ◽  
Ising Spin Glass ◽  
Ising Spin

Thermodynamic properties of a spin-1 model with long-range interactions

2018 ◽  
Vol 32 (05) ◽  
pp. 1850053 ◽  
Author(s):  
Ji-Xuan Hou ◽  
Xu-Chen Yu
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Phase Diagram ◽  
Long Range ◽  
Order Phase Transition ◽  
First Order ◽  
First Order Phase Transition ◽  
Long Range Interactions ◽  
External Magnetic Field Strength ◽  
First Order Phase

The long-range interacting spin-1 chain placed in a staggered magnetic field is studied by means of microcanonical approach. Firstly, we study the microcanonical entropy of the system in the thermodynamic limit and find the system is non-ergodic and can exhibit either first-order phase transition or second-order phase transition by shifting the external magnetic field strength. Secondly, we construct the global phase diagram of the system and find a phase transition area in the phase diagram corresponding to the temperature jump of the first-order phase transition.

Long-Range Quantum Coherenceand Quantum Phase Transition in Atom-Microcavity Coupled System

2020 ◽  
Vol 57 (1) ◽  
pp. 012701
Author(s):  
杨志远 Yang Zhiyuan ◽  
邵雅婷 Shao Yating ◽  
吴泉英 Wu Quanying ◽  
郝翔 Hao Xiang
Keyword(s):  
Phase Transition ◽  
Long Range ◽  
Quantum Phase Transition ◽  
Coupled System ◽  
Quantum Phase

THE DISAPPEARANCE OF TWO-DIMENSIONAL LONG RANGE ORDER IN THE HEISENBERG MODEL WITH COMPETING INTERACTIONS

1990 ◽  
Vol 04 (15n16) ◽  
pp. 2319-2333 ◽  
Author(s):  
A. F. BARABANOV ◽  
L. A. MAKSIMOV ◽  
O. A. STARYKH
Keyword(s):  
Long Range ◽  
Heisenberg Model ◽  
Spin Correlation ◽  
Range Order ◽  
Square Lattice ◽  
Spin Excitation ◽  
Spin Liquid ◽  
Long Range Order ◽  
Competing Interactions ◽  
Nearest Neighbours

In the frustrated Heisenberg model with first (J1) and second (J2) nearest neighbours interactions on a square lattice the transition from the long range order state (LROS) to spin liquid state (SLS) is found at α = J1/J2 ≅ 0.25. SLS is characterized by the gap in spin excitation spectrum at T = 0 and, hence, by exponential decay of spin correlation function at large distance. As a result, correlation length is temperature independent in SLS in accordance with neutron experiments on doped La 2 CuO 4.

An unusual zig-zag 1D copper(ii) coordination polymer displaying magnetic phase transition

2017 ◽  
Vol 46 (44) ◽  
pp. 15178-15180 ◽  
Author(s):  
Jun Wang ◽  
Bao-Hong Li ◽  
Lu Lu ◽  
Jian-Qiang Liu ◽  
Hiroshi Sakiyama ◽  
...  
Keyword(s):  
Phase Transition ◽  
Coordination Polymer ◽  
Long Range ◽  
Magnetic Phase Transition ◽  
Magnetic Phase ◽  
Magnetic Ordering ◽  
Magnetic Behaviour ◽  
1D Chain

A new Cu(ii)-based 1D chain was prepared and its magnetic behaviour was investigated, which indicated a magnetic phase transition below 25 K as well as long-range magnetic ordering.

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