Quantum magnetization plateau and sign change of the magnetocaloric effect in a ferrimagnetic spin chain / Boyarchenkov A. S.,Bostrem I. G.,Ovchinnikov A. S. // PHYSICAL REVIEW B. - 2007. - V. 76, l. 22.

ISSN/EISSN:

2469-9950 / 2469-9969

Type:

Article

Abstract:

The magnetocaloric effect in the (5/2,1) ferrimagnetic chain is investiagted using a finite-cluster solver with central spin selection to reduce finite-size effects. We found that an enhanced magnetocaloric effect occurs at the boundary of the ground-state magnetization plateau. The calculated magnetic Gruneisen parameter Gamma(H) exhibits strong signatures of a field-induced quantum phase transition at the critical magnetic field H-c destroying the plateau. We obtain the characteristic increase Gamma(H)similar to T-1/nu z near H-c and the sign change Gamma(H)approximate to-G(r)/(H-H-c), in accordance with scaling theory predictions.

Author keywords:

ANTIFERROMAGNETIC HEISENBERG CHAIN; FIELD-THEORY; HALDANE-GAP

DOI:

10.1103/PhysRevB.76.224410

Web of Science ID:

ISI:000251986400048

Соавторы в МНС:

Другие поля

Поле	Значение
Month	DEC
Publisher	AMER PHYSICAL SOC
Address	ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Language	English
Article-Number	224410
EISSN	2469-9969
Keywords-Plus	ANTIFERROMAGNETIC HEISENBERG CHAIN; FIELD-THEORY; HALDANE-GAP
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
ResearcherID-Numbers	Ovchinnikov, Alexander/B-9906-2009
ORCID-Numbers	Ovchinnikov, Alexander/0000-0002-1173-9260
Number-of-Cited-References	33
Usage-Count-Last-180-days	1
Usage-Count-Since-2013	6
Journal-ISO	Phys. Rev. B
Doc-Delivery-Number	246CZ