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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We have determined the magnetic phase diagram of the quasi-one-dimensional$S=$ 1 Heisenberg antiferromagnet $Ni (C_5 H_{14} N_2)_2 N_3 (PF_6)$ byspecific heat measurements to 150 mK in temperature and 32 T in magnetic field.When field is applied along the spin-chain direction, a new phase appears at$H_{c2}\approx 14$ T. For the previously known phases of field-induced order,accurate determination is made of the power-law exponents of the orderingtemperature near the zero-temperature critical field $H_c$, owing to thefour-fold improvement of the minimum temperature over the previous work. Theresults are compared with the predictions based on the Bose-Einsteincondensation of triplet excitations. Substituting deuterium for hydrogen isfound to slightly reduce the interchain exchange.Comment: 6 pages, 6 figure

physical review. b, condensed matter and materials physics

High-field phase diagram of the Haldane-gap antiferromagnet<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Ni</mml:mi><mml:msub><mml:mrow><mml:mo>(</mml:mo><mml:msub><mml:mi mathvariant="normal">C</mml:mi><mml:mn>5</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">H</mml:mi><mml:mn>14</mml:mn></mml:msub><mml:msub><mml:mi mathvariant="normal">N</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:mo>)</mml:mo></mml:mrow><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:…

High-field phase diagram of the Haldane-gap antiferromagnetNi(C5H14N2)2