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Title: Metamagnetism and kinetic arrest in a long-range ferromagnetically ordered multicaloric double perovskite Y2CoMnO6

Journal Article · · Journal of Magnetism and Magnetic Materials
 [1];  [1];  [1];  [1];  [1];  [2];  [3];  [4];  [5]
  1. Univ. of South Florida, Tampa, FL (United States)
  2. Phenikaa University, Hanoi (Vietnam)
  3. Duy Tan University, Da Nang (Vietnam)
  4. Joint Inst. for Nuclear Research (JINR), Dubna (Russian Federation). Frank Laboratory of Neutron Physics
  5. Yale Univ., New Haven, CT (United States)

A systematic magnetic study of the double perovskite oxide Y2CoMnO6 (YCMO) has been performed. A monoclinic P21/n phase of YCMO was synthesized using a sol-gel method. Neutron diffraction (ND) measurements evidence the onset of long-range ferromagnetic (FM) ordering at TC ~ 76 K, which persists down to 5 K. The presence of 25% antisite disorder, estimated from the ND data, leads to the appearance of short-range antiferromagnetic (AFM) interactions. The existence of thermal hysteresis due to competing interactions between FM and AFM phases is observed in the M vs. T measurements. The pinning of magnetic domain walls at the Co/Mn antiphase boundaries results in a metamagnetic-like behavior. The field dependence of thermomagnetic irreversibility and the nature of virgin curves indicate the occurrence of a kinetic arrest phenomenon, which is further verified via cooling and heating of the system in an unequal fields (CHUF) protocol. In full agreement with the ND data, a detailed analysis of critical exponents near the paramagnetic (PM)-FM phase transition also establishes YCMO as a long-range interacting mean-field system. A close examination of the temperature- and field-dependent magnetic entropy change yields an in-depth understanding of coexisting magnetically ordered and disordered phases in YCMO, leading to a comprehensive magnetic phase diagram of this multifunctional double perovskite system.

Research Organization:
Univ. of South Florida, Tampa, FL (United States)
Sponsoring Organization:
USDOE Office of Science (SC); Vietnam National Foundation for Science and Technology Development (NAFOSTED); Russian Foundation for Basic Research
Grant/Contract Number:
FG02-07ER46438; 103.02-2017.364; 18-02-00359-a
OSTI ID:
1800500
Alternate ID(s):
OSTI ID: 1609026
Journal Information:
Journal of Magnetism and Magnetic Materials, Vol. 507, Issue C; ISSN 0304-8853
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 11 works
Citation information provided by
Web of Science

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