Unexpected magnetism, Griffiths phase, and exchange bias in the mixed lanthanide ${\text{Pr}}_{0.6}$${\text{Er}}_{0.4}$${\text{Al}}_{2}$

Unexpected magnetism, Griffiths phase, and exchange bias in the mixed lanthanide ${Pr}_{0.6}$ ${Er}_{0.4}$ ${Al}_{2}$

Arjun K. Pathak, D. Paudyal, W. T. Jayasekara, S. Calder, A. Kreyssig, A. I. Goldman, K. A. Gschneidner, Jr., and V. K. Pecharsky

Phys. Rev. B 89, 224411 – Published 17 June 2014

Abstract

We report an unusual coexistence of ferromagnetism and ferrimagnetism, and metamagnetism in ${Pr}_{0.6}$ ${Er}_{0.4}$ ${Al}_{2}$ . In addition, this compound retains a clear Griffiths phase behavior even at 1 kOe magnetic field and shows a large exchange bias after field cooling from the paramagnetic state. The crystal-field excitations and opposite exchange interactions between nearest-neighbor and next-nearest-neighbor rare earth sites explain these behaviors.

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Received 18 February 2014
Revised 29 May 2014

DOI:https://doi.org/10.1103/PhysRevB.89.224411

Authors & Affiliations

Arjun K. Pathak^1,*, D. Paudyal¹, W. T. Jayasekara^1,2, S. Calder³, A. Kreyssig^1,2, A. I. Goldman^1,2, K. A. Gschneidner, Jr.^1,4, and V. K. Pecharsky^1,4

¹The Ames Laboratory, U.S. Department of Energy, Iowa State University, Ames, Iowa 50011, USA
²Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011, USA
³Quantum Condensed Matter Division, Neutron Sciences Directorate, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
⁴Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011, USA

^*Corresponding author: pathak138@ameslab.gov

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Vol. 89, Iss. 22 — 1 June 2014

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Physical Review B

covering condensed matter and materials physics

Unexpected magnetism, Griffiths phase, and exchange bias in the mixed lanthanide ${Pr}_{0.6}$ ${Er}_{0.4}$ ${Al}_{2}$

Arjun K. Pathak, D. Paudyal, W. T. Jayasekara, S. Calder, A. Kreyssig, A. I. Goldman, K. A. Gschneidner, Jr., and V. K. Pecharsky

Phys. Rev. B 89, 224411 – Published 17 June 2014

Abstract

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Physical Review B

covering condensed matter and materials physics

Unexpected magnetism, Griffiths phase, and exchange bias in the mixed lanthanide Pr0.6Er0.4Al2

Arjun K. Pathak, D. Paudyal, W. T. Jayasekara, S. Calder, A. Kreyssig, A. I. Goldman, K. A. Gschneidner, Jr., and V. K. Pecharsky

Phys. Rev. B 89, 224411 – Published 17 June 2014

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Unexpected magnetism, Griffiths phase, and exchange bias in the mixed lanthanide ${Pr}_{0.6}$ ${Er}_{0.4}$ ${Al}_{2}$