Wasp -- Waisted loop and Spin frustration in Dy$_{2-x}$Eu$_x$Ti$_2$O$_7$ Pyrochlore

Prajyoti Singh; Arkadeb Pal; Vinod K. Gangwar; Prince K Gupta; Mohd. Alam; Surajit Ghosh; R. K. Singh; A. K. Ghosh; Sandip Chatterjee

Wasp -- Waisted loop and Spin frustration in Dy$_{2-x}$Eu$_x$Ti$_2$O$_7$ Pyrochlore

Materials Science 2019-07-29 v1 Strongly Correlated Electrons

Authors: Prajyoti Singh , Arkadeb Pal , Vinod K. Gangwar , Prince K Gupta , Mohd. Alam , Surajit Ghosh , R. K. Singh , A. K. Ghosh , Sandip Chatterjee

View on arXiv ↗ PDF ↗

Abstract

The Raman spectroscopy and AC and DC magnetization of Dy $_{2-x}$ Eu $_x$ Ti $_2$ O $_7$ have been investigated. In Raman Spectroscopy, the systematic shift in all phonon modes with Eu content in Dy $_{2-x}$ Eu $_x$ Ti $_2$ O $_7$ confirms that Dy $^{3+}$ ion is substituted by Eu3+ ions. High concentration of Eu induces the dipolar exchange interactions and crystal-field interactions in Dy $_{2-x}$ Eu $_x$ Ti $_2$ O $_7$ . Rich Eu content samples (x=1.8 and 1.9) show the existence of wasp-waisted hysteresis loop and that can be attributed to the coexistence of dipolar field and anisotropy exchange interaction. AC susceptibility shows two single ion spin freezing transitions corresponding to Dy $^{3+}$ and Eu $^{3+}$ ions respectively in x = 1.5, 1.8, 1.9 samples.

Keywords

pyrochlore raman spectroscopy magnetization wasp-waisted hysteresis loop spin frustration spin freezing

Cite

@article{arxiv.1907.11383,
  title  = {Wasp -- Waisted loop and Spin frustration in Dy$_{2-x}$Eu$_x$Ti$_2$O$_7$ Pyrochlore},
  author = {Prajyoti Singh and Arkadeb Pal and Vinod K. Gangwar and Prince K Gupta and Mohd. Alam and Surajit Ghosh and R. K. Singh and A. K. Ghosh and Sandip Chatterjee},
  journal= {arXiv preprint arXiv:1907.11383},
  year   = {2019}
}

Comments

25 pages, 7 figures

Wasp -- Waisted loop and Spin frustration in Dy$_{2-x}$Eu$_x$Ti$_2$O$_7$ Pyrochlore

Abstract

Keywords

Cite

Comments

Related papers