English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The magnetization process, the susceptibility and the specific heat of thespin-1/2 AF-AF-F and F-F-AF trimerized quantum Heisenberg chains have beeninvestigated by means of the transfer matrix renormalization group (TMRG)technique as well as the modified spin-wave (MSW) theory. A magnetizationplateau at $m=1/6$ for both trimerized chains is observed at low temperature.The susceptibility and the specific heat show various behaviors for differentferromagnetic and antiferromagnetic interactions and in different magneticfields. The TMRG results of susceptibility and the specific heat can be nicelyfitted by a linear superposition of double two-level systems, where two fittingequations are proposed. Three branch excitations, one gapless excitation andtwo gapful excitations, for both systems are found within the MSW theory. It isobserved that the MSW theory captures the main characteristics of thethermodynamic behaviors at low temperatures. The TMRG results are also comparedwith the possible experimental data.Comment: 11 pages, 10 figure

physical review. b, condensed matter and materials physics

Thermodynamics of spin-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>1</mml:mn><mml:mo>∕</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:math>antiferromagnet-antiferromagnet-ferromagnet and ferromagnet-ferromagnet-antiferromagnet trimerized quantum Heisenberg chains

Thermodynamics of spin-1∕2antiferromagnet-antiferromagnet-ferromagnet and ferromagnet-ferromagnet-antiferromagnet trimerized quantum Heisenberg chains